Quiz: Anatomy_Lab1

Question 1

1. The skin is ________ to the bones.

Choices:

• superficial
• distal
• caudal
• superior

Answers:

• superficial

Comments:

• Correct
• That's right! Superficial means “toward the surface”.
• Continue

Question 2

2. The intestines are ________ to the esophagus.

Choices:

• superficial
• distal
• caudal
• superior

Answers:

• distal

Comments:

• Correct
• That's right! Distal means farther from the beginning – in this case, the beginning of the digestive tract, being the mouth.
• Continue

Question 3

3. The lumbar region of the back is ________ to the cervical region.

Choices:

• superficial
• distal
• caudal
• superior

Answers:

• caudal

Comments:

• Correct
• That's right! Caudal means “toward the tail”.
• Continue

Question 4

4. The head is ________ to the body.

Choices:

• superficial
• distal
• caudal
• superior

Answers:

• superior

Comments:

• Correct
• That's right! Superior means “above”.
• Continue

Question 5

5. The heart is ________ to the lungs.

Choices:

• medial
• inferior
• proximal
• ventral

Answers:

• medial

Comments:

• Correct
• That's right! Medial means “closer to the midline”.
• Continue

Question 6

6. The stomach is ________ to the heart.

Choices:

• medial
• inferior
• proximal
• ventral

Answers:

• inferior

Comments:

• Correct
• That's right! Inferior means “below”.
• Continue

Question 7

7. The elbow is ________ to the hand.

Choices:

• medial
• inferior
• proximal
• ventral

Answers:

• proximal

Comments:

• Correct
• That's right! Proximal means “closer to the beginning” - in this case the shoulder, which is the beginning of the upper limb.
• Continue

Question 8

8. The breast bone is ________ to the vertebral column.

Choices:

• medial
• inferior
• proximal
• ventral

Answers:

• ventral

Comments:

• Correct
• That's right! Ventral means “toward the front”.
• Continue

Question 9

9. The spleen is an unpaired, left-sided structure. It is possible to see the spleen in all of the following planes of section, EXCEPT:

Choices:

• Parasagittal
• Coronal
• Midsagittal
• Horizontal

Answers:

• Midsagittal

Comments:

• Correct
• That's right! The spleen can be seen in a parasagittal, coronal or horizontal section. Since it is not in the midline, it cannot be seen in a midsagittal section.
• Continue

Question 10

10. The kidneys are bilaterally paired structures not found in the midline. In which plane of section is it possible to see only one kidney?

Choices:

• Parasagittal
• Coronal
• Midsagittal
• Horizontal

Answers:

• Parasagittal

Comments:

• Correct
• That's right! Coronal or horizontal sections would pass through both kidneys. A midsagittal section would not pass through either kidney. Only a parasagittal section is bale to pass through only one kidney.
• Continue

Question 11

11. Choose one INCORRECT statement regarding a human in the anatomical position.

Choices:

• The lungs are lateral to the heart.
• The palms are on the ventral surface of the hands.
• The wrist is distal to the elbow.
• The skin is superficial to the viscera.
• The thorax is inferior to the pelvis.

Answers:

• The thorax is inferior to the pelvis.

Comments:

• Correct
• That's right! The thorax is superior (above) to the pelvis.
• Continue

Question 12

12. Which of the following planes divides the body into two symmetrical right / left halves?

Choices:

• Parasagittal
• Coronal
• Midsagittal
• Horizontal

Answers:

• Midsagittal

Comments:

• Correct
• That's right! The coronal plane divides the body into anterior and posterior subdivisions. The horizontal plane divides the body into superior and inferior subdivisions. The parasagittal plane divides the body into unequal right / left subdivisions.
• Continue

Question 13

13. What movement is occurring in the knee?

Choices:

• abduction
• flexion
• medial rotation
• extension
• adduction
• lateral rotation

Answers:

• flexion

Comments:

• Correct
• That's right! The angle between the thigh and leg is decreasing, and so this movement is flexion.
• Continue

Question 14

14. What movement is occurring in the spine?

Choices:

• flexion
• extension
• left rotation
• left lateral flexion
• right rotation
• right lateral flexion

Answers:

• left rotation

Comments:

• Correct
• That's right! The body is turning to the left, rotating around the long axis of the spine.
• Continue

Question 15

15. What movement is occurring in the spine?

Choices:

• flexion
• extension
• left rotation
• left lateral flexion
• right rotation
• right lateral flexion

Answers:

• right lateral flexion

Comments:

• Correct
• That's right! The vertebral column is bending to the right.
• Continue

Question 16

16. What movement is occurring in the wrist?

Choices:

• flexion
• extension
• abduction
• adduction
• medial rotation
• lateral rotation

Answers:

• flexion

Comments:

• Correct
• That's right! The angle between the hand and forearm is decreasing. This is flexion.
• Continue

Question 17

17. What movement is occurring in the shoulder?

Choices:

• flexion
• extension
• abduction
• adduction
• medial rotation
• lateral rotation

Answers:

• adduction

Comments:

• Correct
• That's right! The upper limb is moving toward the midline of the body. This is adduction.
• Continue

Question 18

18. What movement is occurring in the fingers?

Choices:

• flexion
• extension
• abduction
• adduction
• medial rotation
• lateral rotation

Answers:

• flexion

Comments:

• Correct
• That's right! The angle of the finger joints is decreasing. This is flexion.
• Continue

Question 19

19. What movement is occurring in the knuckles?

Choices:

• flexion
• extension
• abduction
• adduction
• medial rotation
• lateral rotation

Answers:

• abduction

Comments:

• Correct
• That's right! The fingers are moving away from the midline of the hand, which is the middle finger. This is abductioB.
• Continue

Question 20

20. What movement is occurring in the shoulder?

Choices:

• flexion
• extension
• abduction
• adduction
• medial rotation
• lateral rotation

Answers:

• lateral rotation

Comments:

• Correct
• That's right! The arm is rotating around its long axis, such that the forearm is carried laterally. This is lateral rotation.
• Continue

Question 1

1. What is the target of somatic motor fibres?

Choices:

• skeletal (voluntary) muscle.
• cardiac muscle.
• skin
• visceral organs

Answers:

• skeletal (voluntary) muscle.

Comments:

• Correct
• That's right! Somatic motor fibres are defined by their target. They innervate voluntary (skeletal or striated) muscle.
• Continue

Question 2

2. Which of the following functional subtypes of neurons is found in the dorsal ramus? Choose all that apply.

Choices:

• postganglionic sympathetic
• somatic motor
• sensory from the body wall and limbs
• postganglionic parasympathetic
• preganglionic parasympathetic
• preganglionic sympathetic
• sensory from visceral organs

Answers:

• postganglionic sympathetic
• somatic motor
• sensory from the body wall and limbs

Comments:

• Correct
• That's right! Dorsal (and ventral) rami innervate skeletal muscle and skin of the body wall and limbs, and so contain somatic motor fibres, sensory fibres and sympathetic postganglionic fibres.
• Continue

Question 3

3. What is the difference between a dorsal ramus and a ventral ramus?

Choices:

• Dorsal rami contain sensory fibres only and ventral rami contain motor fibres only.
• They innervate different classes of target tissues in the same region of the body.
• They innervate the same classes of target tissues, but in different regions of the body.
• There is no difference; the terms are synonymous

Answers:

• They innervate the same classes of target tissues, but in different regions of the body.

Comments:

• Correct
• That's right! Dorsal and ventral rami do not differ with respect to the functional fibres types they contain. They differ only in the body region that each targets.
• Continue

Question 4

4. Identify the INCORRECT statement regarding the subdivisions of the nervous system.

Choices:

• Somatic motor fibres innervate cardiac muscle.
• Sympathetic output arises from spinal levels T1 - L2.
• The autonomic nervous system provides sensory input from organs.
• The parasympathetic nervous system dominates during rest and the sympathetic system dominates in times of stress.

Answers:

• Somatic motor fibres innervate cardiac muscle.

Comments:

• Correct
• That's right! Somatic motor fibres, by definition, innervate voluntary (striated, skeletal) muscle. Autonomic (sympathetic and parasympathetic) motor fibres innervate the heart.
• Continue

Question 5

5. Which of the following classes of neurons are pseudounipolar?

Choices:

• sensory from internal organs (viscera)
• sensory from the body wall and limbs
• postganglionic parasympathetic
• preganglionic parasympathetic
• postganglionic sympathetic
• preganglionic sympathetic
• somatic motor

Answers:

• sensory from internal organs (viscera)
• sensory from the body wall and limbs

Comments:

• Correct
• That's right! All other options are motor, and are therefore multipolar neurons.
• Continue

Question 6

6. A dermatome is formed by contributions from both the dorsal ramus and the ventral ramus that arise from a given spinal nerve.

Choices:

• True
• False

Answers:

• True

Comments:

• Correct
• That's right! The dorsal ramus innervates the para-axial portions of the dermatome and the ventral ramus innervates the remainder of the dermatome.
• Continue

Question 7

7. Which of the following functional subtypes of neurons is found in a ventral root arising from the spinal cord in the cervical region? Choose all that apply.

Choices:

• somatic motor
• postganglionic parasympathetic
• preganglionic parasympathetic
• postganglionic sympathetic
• preganglionic sympathetic
• sensory from the body wall
• sensory from internal organs (viscera)

Answers:

• somatic motor

Comments:

• Correct
• That's right! Outside of the T1-L2 levels, ventral roots contain only axons of somatic motor neurons.
• Continue

Question 8

8. Which of the following functional subtypes of neurons is found in a ventral root arising from the spinal cord in the lower lumbar region? Choose all that apply.

Choices:

• somatic motor
• postganglionic parasympathetic
• preganglionic parasympathetic
• postganglionic sympathetic
• preganglionic sympathetic
• somatic sensory
• visceral sensory

Answers:

• somatic motor

Comments:

• Correct
• That's right! Outside of the T1-L2 levels, ventral roots contain only axons of somatic motor neurons.
• Continue

Question 9

9. Which of the following functional subtypes of neurons is found in a dorsal root? Choose all that apply.

Choices:

• sensory from internal organs (viscera)
• sensory from the body wall and limbs
• postganglionic parasympathetic
• preganglionic parasympathetic
• postganglionic sympathetic
• preganglionic sympathetic
• somatic motor

Answers:

• sensory from internal organs (viscera)
• sensory from the body wall and limbs

Comments:

• Correct
• That's right! Sensory axons from the body wall and limbs unite with sensory axons from viscera in the dorsal root.
• Continue

Question 10

10. What are the defining characteristics of dorsal root ganglia? Choose all that apply.

Choices:

• they are a component of the peripheral nervous system
• contain sensory neurons
• contain pseudounipolar neurons
• contain multipolar neurons
• they are a component of the central nervous system
• contain parasympathetic neurons
• contain sympathetic neurons
• contain somatic motor neurons

Answers:

• they are a component of the peripheral nervous system
• contain sensory neurons
• contain pseudounipolar neurons

Comments:

• Correct
• That's right! Ganglia, by definition, are PNS structures that contain neuronal cell bodies. In the case of dorsal root ganglia, the contained neurons are pseudounipolar and sensory.
• Continue

Question 11

11. Which of the following are mixed (both sensory and motor) nerves? Choose all that apply.

Choices:

• ventral ramus
• dorsal ramus
• spinal nerve
• ventral root
• dorsal root

Answers:

• ventral ramus
• dorsal ramus
• spinal nerve

Comments:

• Correct
• That's right! Sensory and motor fibres are segregated in dorsal and ventral roots, respectively. All others are mixed, containing both sensory and motor fibres.
• Continue

Question 12

12. Dorsal rami are typically larger than ventral rami.

Choices:

• True
• False

Answers:

• False

Comments:

• Correct
• That's right! Dorsal rami innervate only the para-axial region of the body, and so are smaller than ventral rami, which innervate the remainder of the body, including the limbs.
• Continue

Question 13

13. What are the targets of the sympathetic nervous system in the body wall and limbs? Choose all that apply.

Choices:

• muscle in the walls of blood vessels
• smooth muscle that makes your hair stand on end
• sweat glands
• temperature receptors in the skin
• voluntary muscle

Answers:

• muscle in the walls of blood vessels
• smooth muscle that makes your hair stand on end
• sweat glands

Comments:

• Correct
• That's right! The sympathetic nervous system innervates the smooth muscle and glands of the body wall and limbs.
• Continue

Question 14

14. What nerves deliver sensory fibres to the skin overlying the vertebral column?

Choices:

• dorsal rami
• ventral rami
• ventral root

Answers:

• dorsal rami

Comments:

• Correct
• That's right! Skin overlying the para-axial region is innervated by the dorsal rami.
• Continue

Question 15

15. What nerves deliver voluntary motor fibres to the muscle adjacent to the spine?

Choices:

• dorsal rami
• ventral rami
• ventral root

Answers:

• dorsal rami

Comments:

• Correct
• That's right! Muscles of the para-axial region are innervated by somatic motor fibres contained within the dorsal rami.
• Continue

Question 16

16. Ventral rami are larger than dorsal rami.

Choices:

• True
• False

Answers:

• True

Comments:

• Correct
• That's right! Ventral rami innervate anterolateral portions of the body wall and the limbs. Dorsal rami innervate only the para-axial region of the body. Therefore, ventral rami are larger than dorsal rami.
• Continue

Question 17

17. A patient presents with skin that is red and dry. What functional component of their peripheral nerves is not functional?

Choices:

• sympathetic motor
• somatic motor
• sensory

Answers:

• sympathetic motor

Comments:

• Correct
• That's right! The sympathetic nervous system controls vascular tone and glands of the skin. Without it, blood vessels dilate, making the skin appear red, and glands are nonfunctional, making the skin dry.
• Continue

Question 1

1. Identify the CORRECT statement regarding the cervical vertebrae.

Choices:

• They have the largest vertebral body.
• They have costal facets on their transverse processes.
• Their spinous processes are blunt, square and extend straight backwards from the neural arch.
• Their zygopophysial joints are sloped from anterior to posterior.

Answers:

• Their zygopophysial joints are sloped from anterior to posterior.

Comments:

• Correct
• That's right! You selected the correct response.
• Continue

Question 2

2. What passes through the foramen indicated by the arrow?

Choices:

• vertebral artery
• vertebral arteries
• the vertebral arteries
• the vertebral artery

Answers:

• vertebral artery
• vertebral arteries
• the vertebral arteries
• the vertebral artery

Comments:

• Correct
• That's right! The vertebral arteries thread through the transverse foramina of the cervical vertebrae.
• Continue

Question 3

3. Identify the INCORRECT statement regarding the ligaments of the vertebral column.

Choices:

• Because of the location of the anterior and posterior longitudinal ligaments, herniated discs will more commonly protrude out laterally.
• The ligamenta flava have a lower elastic fibre content than most other ligaments, and therefore greatly restrict flexion of the vertebral column.
• The interspinous and supraspinous ligaments act to restrict flexion of the vertebral column.
• The transverse ligament holds the dens in place, allowing the atlas to rotate around the dens.

Answers:

• The ligamenta flava have a lower elastic fibre content than most other ligaments, and therefore greatly restrict flexion of the vertebral column.

Comments:

• Correct
• That's right! The ligamenta flava have a particularly high elastic fibre content and so have more resilience (ability to “bounce back” from stretch) than other ligaments.
• Continue

Question 4

4. Identify the sacral promontory (click the image).

Choices:

• Oval Hotspot 4
• Oval Hotspot 1
• Oval Hotspot 2
• Oval Hotspot 3
• Incorrect

Answers:

• Oval Hotspot 4

Comments:

• Correct
• That's right! The sacral promontory is the remnant of the S1 vertebral body, and so forms the anterior mass of the superior aspect of the sacrum.
• Continue

Question 5

5. Identify the CORRECT statement regarding the vertebral column.

Choices:

• The laminae connect the pedicles to the vertrbral body.
• The C7 spinous process is not palpatable.
• During development, the dens of the axis begins as the vertebral body of the atlas.
• The orientation of the zygopophyseal joints is the same between different regions of the spinal column.

Answers:

• During development, the dens of the axis begins as the vertebral body of the atlas.

Comments:

• Correct
• That's right! During development, the C2 vertebral body fuses with the C1 vertebral body to form its dens.
• Continue

Question 1

1. Identify the INCORRECT statement regarding the spinal cord and nerves.

Choices:

• Below the cervical level, spinal nerves are numbered according to the vertebral body above their point of exit.
• The spinal cord ends as the conus medullaris at approximately the L2 vertebral body.
• The dorsal and ventral rootlets decrease in length from rostral to caudal.
• Spinal nerves exit through the intervertebral foramina.

Answers:

• The dorsal and ventral rootlets decrease in length from rostral to caudal.

Comments:

• Correct
• That's right! In fact, its the dorsal and ventral rami that increase in length from rostral to caudal.
• Continue

Question 2

2. You are looking into the lumbar cistern. Which layer of the meninges contributes to the structure indicated by the arrow?

Choices:

• pia
• pia mater

Answers:

• pia
• pia mater

Comments:

• Correct
• That's right! The pia mater extends from the conus medullaris to cover the filum terminale interna.
• Continue

Question 3

3. Identify the CORRECT statement regarding the meninges.

Choices:

• The filum terminale externa is an extension of pia mater from the conus medularis within the lumbar cistern.
• In life, the space between the dura and arachnoid mater is filled with cerebral spinal fluid (CSF).
• The dura and arachnoid mater form the dural sac.
• The dural sac begins at the L2 vertebral body and ends at the S2 vertebral body.

Answers:

• The dura and arachnoid mater form the dural sac.

Comments:

• Correct
• That's right! Two layers of meninges, the dura and arachnoid, together form the dural sac.
• Continue

Question 4

4. Click on the star that corresponds to the level at which a lumbar puncture is typically performed.

Choices:

• Oval Hotspot 1
• Oval Hotspot 2
• Oval Hotspot 3
• Oval Hotspot 4
• Incorrect

Answers:

• Oval Hotspot 3

Comments:

• Correct
• That's right! A lumbar puncture is typically performed between the L3 and L4 vertebrae.
• Continue

Question 5

5. This is a posterior view of a spinal cord in situ. Identify the structures indicated by the arrow.

Choices:

• dorsal rootlet
• dorsal rootlets

Answers:

• dorsal rootlet
• dorsal rootlets

Comments:

• Correct
• That's right! These nerves arising from the dorsal aspect of the spinal cord are the dorsal rootlets.
• Continue

Question 1

1. A nerve contains only somatic motor fibres and sympathetic preganglionic fibres. What nerve is it?

Choices:

• a ventral root
• a dorsal root
• a spinal nerve
• a dorsal ramus
• a ventral ramus

Answers:

• a ventral root

Comments:

• Correct
• That's right! Ventral roots are the only nerves that can contain only these two functional types of fibres.
• Continue

Question 2

2. A nerve contains only sensory fibres, bringing information into the spinal cord from the body surface and from internal organs. What nerve is it?

Choices:

• a ventral root
• a dorsal root
• a spinal nerve
• a dorsal ramus
• a ventral ramus

Answers:

• a dorsal root

Comments:

• Correct
• That's right! Only a dorsal root contains exclusively sensory fibres from both the body wall and from viscera.
• Continue

Question 3

3. A ganglion contains pseudounipolar cell bodies. Which ganglion is it? Choose all that apply.

Choices:

• a dorsal root ganglion
• a sympathetic ganglion
• a parasympathetic ganglion

Answers:

• a dorsal root ganglion

Comments:

• Correct
• That's right! Autonomic ganglia contain multipolar motor neurons. Only the dorsal root ganglion contains pseudounipolar neurons.
• Continue

Question 4

4. A nerve contains sensory fibres, somatic motor fibres and sympathetic postganglionic fibres. What nerve might it be? Choose all that apply.

Choices:

• a ventral ramus
• a dorsal ramus
• a spinal nerve
• a dorsal root
• a ventral root

Answers:

• a ventral ramus
• a dorsal ramus
• a spinal nerve

Comments:

• Correct
• That's right! Remember, motor and sensory fibres are segregated in ventral and dorsal roots, respectively.
• Continue

Question 5

5. How do dorsal and ventral rami differ? Choose all that apply.

Choices:

• dorsal and ventral rami innervate different regions of the body
• dorsal rami are smaller than ventral rami
• the axons in dorsal and ventral rami target different tissue types
• dorsal and ventral rami contain different functional groups of axons

Answers:

• dorsal and ventral rami innervate different regions of the body
• dorsal rami are smaller than ventral rami

Comments:

• Correct
• That's right! Dorsal and ventral rami contain the same functional types of nerve fibres and innervate the same classes of target tissues. They differ in their size and the regions of the body that they innervate.
• Continue

Question 6

6. A nerve contains sympathetic preganglionic fibres. What nerve might it be? Choose all that apply.

Choices:

• a white ramus communicans
• a spinal nerve
• a ventral root
• a grey ramus communicans
• a ventral ramus
• a dorsal ramus
• a dorsal root

Answers:

• a white ramus communicans
• a spinal nerve
• a ventral root

Comments:

• Correct
• That's right! Preganglionic sympathetic fibres pass through the ventral root, spinal nerve and white ramus communicans to enter a sympathetic chain ganglion.
• Continue

Question 7

7. A nerve contains sympathetic postganglionic fibres. What nerve might it be? Choose all that apply.

Choices:

• a grey ramus communicans
• a ventral ramus
• a dorsal ramus
• a spinal nerve
• a white ramus communicans
• a dorsal root
• a ventral root

Answers:

• a grey ramus communicans
• a ventral ramus
• a dorsal ramus
• a spinal nerve

Comments:

• Correct
• That's right! Sympathetic postganglionic fibres destined to innervate targets in the body wall pass from the chain ganglion through the grey ramus communicans, spinal nerve, and then either the dorsal or ventral ramus to reach their target tissue.
• Continue

Question 8

8. A ventral root contains somatic motor fibres, but no sympathetic preganglionic fibres. At what level of the spinal cord is this ventral root located? Choose all that apply.

Choices:

• a ventral root below L2
• a ventral root at any cervical level
• a ventral root between T1 and L2

Answers:

• a ventral root below L2
• a ventral root at any cervical level

Comments:

• Correct
• That's right! Remember, ventral root at and between T1 - L2 contain sympathetic preganglionic fibres arising from the spinal cord at these levels.
• Continue

Question 9

9. Which spinal nerves are connected to the sympathetic chain by both a white ramus communicans and a grey ramus communicans? Choose all that apply.

Choices:

• a ventral root between T1 and L2
• a ventral root below L2
• a ventral root at any cervical level

Answers:

• a ventral root between T1 and L2

Comments:

• Correct
• That's right! White rami communicans are only found at those levels from which sympathetic outflow originates, i.e. T1 - L2.
• Continue

Question 10

10. Which spinal nerves are connected to the sympathetic chain by a grey ramus communicans, but not a white ramus communicans? Choose all that apply.

Choices:

• a ventral root below L2
• a ventral root at any cervical level
• a ventral root between T1 and L2

Answers:

• a ventral root below L2
• a ventral root at any cervical level

Comments:

• Correct
• That's right! Sympathetic postganglionic fibres leave the chain to gain access to spinal nerves above T1 and below L2.
• Continue

Question 1

1. Which spinal levels contribute to the formation of the brachial plexus? Choose all that apply.

Choices:

• T1
• C8
• C7
• C6
• C5
• T2
• C4

Answers:

• T1
• C8
• C7
• C6
• C5

Comments:

• Correct
• That's right! The roots of the brachial plexus are the ventral rami of spinal nerves C5 - T1.
• Continue

Question 2

2. Which spinal levels contribute to the formation of the dorsal scapular nerve (as indicated by the arrow)? Choose all that apply.

Choices:

• C5
• T2
• T1
• C8
• C7
• C6
• C4

Answers:

• C5

Comments:

• Correct
• That's right! The dorsal scapular nerve contains fibres from the C5 level, only.
• Continue

Question 3

3. Which spinal levels contribute to the formation of the long thoracic nerve (as indicated by the arrow)? Choose all that apply.

Choices:

• C7
• C6
• C5
• T2
• T1
• C8
• C4

Answers:

• C7
• C6
• C5

Comments:

• Correct
• That's right! The long thoracic nerve contains fibres from the C5, C6 and C7 levels.
• Continue

Question 4

4. Which spinal levels contribute to the formation of the lateral cord of the brachial plexus (as indicated by the arrow)?

Choices:

• C7
• C6
• C5
• T2
• T1
• C8
• C4

Answers:

• C7
• C6
• C5

Comments:

• Correct
• That's right! The lateral cord of the brachial plexus contains fibres from the C5 - C7 levels.
• Continue

Question 5

5. Which spinal levels contribute to the formation of the radial nerve (as indicated by the arrow)?

Choices:

• T1
• C8
• C7
• C6
• C5
• T2
• C4

Answers:

• T1
• C8
• C7
• C6
• C5

Comments:

• Correct
• That's right! The radial nerve contains fibres from the C5 - T1 levels.
• Continue

Question 6

6. Which dermatomes (spinal levels) contribute to the sensory distribution of the ulnar nerve (as indicated by the arrow)?

Choices:

• T1
• C8
• T2
• C7
• C6
• C5
• C4

Answers:

• T1
• C8

Comments:

• Correct
• That's right! The ulnar nerve contains fibres from the C8 - T1 levels.
• Continue

Question 7

7. Which spinal levels contribute to the formation of the medial cord of the brachial plexus (as indicated by the arrow)?

Choices:

• T1
• C8
• T2
• C7
• C6
• C5
• C4

Answers:

• T1
• C8

Comments:

• Correct
• That's right! The medial cord of the brachial plexus contains fibres from the C8 - T1 levels.
• Continue