Anatomy and Physiology Week 1 Assignment 1

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R E V I E W
NAME ____________________________________ LAB TIME/DATE _______________________

S H E E T
EXERCISE

21

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Spinal Cord, Spinal Nerves, and the Autonomic Nervous System Anatomy of the Spinal Cord
1. Match each anatomical term in the key to the descriptions given below. Key: a. cauda equina 1. 2. 3. 4. b. conus medullaris c. filum terminale d. foramen magnum

most superior boundary of the spinal cord meningeal extension beyond the spinal cord terminus spinal cord terminus collection of spinal nerves traveling in the vertebral canal below the terminus of the spinal cord

2. Match the key letters on the diagram with the following terms. 1. 2. 3. 4. 5. arachnoid mater central canal 7. dorsal (posterior) horn dorsal ramus of spinal nerve dorsal root ganglion o n a

6.

dorsal root of spinal nerve dura mater

11. 12. 13.

spinal nerve ventral (anterior) horn ventral ramus of spinal nerve ventral root of spinal nerve white matter

8. 9. 10.

gray commissure lateral horn pia mater 14. 15.

b c

m

d

l

e f

k

g

h j

i

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3. Choose the proper answer from the following key to respond to the descriptions relating to spinal cord anatomy. Key: a. sensory 1. 2. 3. b. motor c. both sensory and motor 4. 5. 6. d. interneurons

neuron type found in dorsal horn neuron type found in ventral horn neuron type in dorsal root ganglion

fiber type in ventral root fiber type in dorsal root fiber type in spinal nerve

4. Where in the vertebral column is a lumbar puncture generally done? Why is this the site of choice?

5. The spinal cord is enlarged in two regions, the What is the significance of these enlargements?

and the

regions.

6. How does the position of the gray and white matter differ in the spinal cord and the cerebral hemispheres?

7. From the key, choose the name of the tract that might be damaged when the following conditions are observed. (More than one choice may apply.) 1. 2. 3. 4. 5. uncoordinated movement lack of voluntary movement tremors, jerky movements diminished pain perception diminished sense of touch Key: a. b. c. d. e. f. g. h. i. j. k. fasciculus cuneatus fasciculus gracilis lateral corticospinal tract anterior corticospinal tract tectospinal tract rubrospinal tract vestibulospinal tract lateral spinothalamic tract anterior spinothalamic tract posterior spinocerebellar tract anterior spinocerebellar tract

Dissection of the Spinal Cord
8. Compare and contrast the meninges of the spinal cord and the brain.

9. How can you distinguish between the dorsal and ventral horns?

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Review Sheet 21

Spinal Nerves and Nerve Plexuses
10. In the human, there are 31 pairs of spinal nerves, named according to the region of the vertebral column from which they issue. The spinal nerves are named below. Indicate how they are numbered. cervical nerves lumbar nerves sacral nerves thoracic nerves ,

11. The ventral rami of spinal nerves C1 through T1 and T12 through S4 take part in forming which serve the between the ribs to serve the serve .

of the body. The ventral rami of T2 through T12 run . The dorsal rami of the spinal nerves

12. What would happen if the following structures were damaged or transected? (Use the key choices for responses.) Key: a. loss of motor function 1. 2. 13. Define plexus. b. loss of sensory function c. 3. loss of both motor and sensory function ventral ramus of a spinal nerve

dorsal root of a spinal nerve ventral root of a spinal nerve

14. Name the major nerves that serve the following body areas. 1. 2. 3. 4. 5. 6. 7. 8. 9. head, neck, shoulders (name plexus only) diaphragm posterior thigh leg and foot (name two) anterior forearm muscles (name two) arm muscles (name two) abdominal wall (name plexus only) anterior thigh medial side of the hand

The Autonomic Nervous System
15. For the most part, sympathetic and parasympathetic fibers serve the same organs and structures. How can they exert...
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