NAME ____________________________________ LAB TIME/DATE _______________________
S H E E T
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. D C B 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. K A C 1. 2. 3. 4. 5. arachnoid mater central canal dorsal (posterior) horn dorsal ramus of spinal nerve dorsal root ganglion o n a
N J O D L
6. 7. 8. 9. 10.
dorsal root of spinal nerve dura mater gray commissure lateral horn pia mater
F M I
11. 12. 13. 14. 15.
spinal nerve ventral (anterior) horn ventral ramus of spinal nerve ventral root of spinal nerve white matter
3. Choose the proper answer from the following key to respond to the descriptions relating to spinal cord anatomy. Key: a. D B A sensory 1. 2. 3. b. motor c. both sensory and motor B A A&B 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?
between L3 and L5
does not endanger the delicate spinal cord
5. The spinal cord is enlarged in two regions, the
What is the significance of these enlargements? of the body have to fit in these areas
because spinal cord is not that but all the nerves that branch out
6. How does the position of the gray and white matter differ in the spinal cord and the cerebral hemispheres? in the spinal cord the outer layer is the white matter and the inner layer is the grey matter. But in the cerebrum white matter is the inner layer and grey matter the outer layer 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.) HLAB CD HLAB H IAB 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. both contain CT that make meninges. Both surround & protect. The dura mater in vertebral canal is separate & in the cranial cavity it is tightly adhered. 9. How can you distinguish between the dorsal and ventral horns? tapered than those of the dorsal horns the tips of the vertebral horns & broader & less
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 C1 - C8 sacral nerves S1 - S5 T1 - T12 plexuses ,
L1 - L5
11. The ventral rami of spinal nerves C1 through T1 and T12 through S4 take part in forming which serve the motor, sensory needs of muscle, skin of limb intercoastal nerves .
of the body. The ventral rami of T2 through T12 run . The dorsal rami of the spinal nerves
between the ribs to serve the serve...