28: Meninges, Spinal Cord, and Spinal Nerves

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Pia mater

3

Gray matter

Posterior horn, Gray commissure, Lateral horn, Anterior horn

Meninges

E

True

There are eight pairs of cervical spinal nerves (T/F)

Arachnoid mater

4

Dura Mater

5

31 pairs

How many pairs of spinal nerves are there?

T12 (minor contributions) and L1-L4

Significant nerves of Plexus: Femoral, orbturator Area served: Inferior abdominopelvic and anterior thigh

C5-C8 and T1

Significant nerves of Plexus: Musculocutaneous, axillary, radial, median, ulnar Area served: Shoulder, arm, forearm, and hand

C1-C5

Significant nerves of Plexus: Phrenic (c3-c5) Area served: neck, shoulder, diaphragm, and portions of head

S4-S5 and Co1

Significant nerves of Plexus: Pudendal Area served: Pelvic Floor

L4-L5 and S1-S4

Significant nerves of Plexus: Sciatic (common fibular and tibial) Area served: Buttock, posterior thigh, leg, and foot

True

The brachial plexus is formed from components of spinal nerves C5-T1 (T/F)

gray commisure

The central canal of the spinal cord is located within the white matter gray commisure epidural space subarachnoid space

sensory neurons

The dorsal root of the spinal nerves contains interneurons motor neurons sensory neurons sensory and motor neurons

Inferior to L1

The inferior end of the adult spinal cord terminates inferior to L1 in the sacrum inferior to L5 in the coccyx

False (white matter)

The major ascending (sensory) and descending (motor) tracts compose the gray matter of the spinal cord (T/F)

dura mater

What is the most superficial membrane of the meninges? subarachnoid space pia mater dura mater arachnoid mater

lateral funiculus

Which of the following is not part of the gray matter of the spinal cord? gray commissure lateral funiculus posterior horn lateral horn


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