Anatomy Chapter 14: Spinal Cord and Spinal Nerves

Supplies nerves to the pectoral girdle and upper limbs

Provides innervation to structures of the prelvis and lower limbs

-specialized membranes that provide protection, physical stability, and shock absorption
-cover the spinal cord and spinal nerve roots

1. dura mater (outside) -tough
2. arachnoid mater (middle) - subarachnoid space filled with cerebrospinal fluid
3. pia mater (inside) - delicate

8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal

1. the cervical plexus
2. brachial plexus
3. the lumbar plexus
4. the sacral plexus

1. arrival of a stimulus and activation of a receptor
2. relay of info to the CNS
3. info processing
4. activation of a motor neuron
5. response of a peripheral effecter

1. development (innate or acquired)
2. the site where info processing occurs (spinal or cranial)
3. the nature of the resulting motor response (somatic or visceral)
4. the compelxity of the neural circuit involved (monosynpatic or polysnaptic)

C1-C5
-Cranial nerves - Accessory (NXI) and Hypoglossal nerve (NXII); Lesser occiptal nerve; Supraclavicular nerves; phrenic nerve

C4-T1
-Musculocutaneous nerve (C5-C7); Ulnar nerve (C8, T1); Radial nerve (C5-T1); Median nerve (C6-T1)-carpal tunnel

T12-L4
-Femoral nerve (L2-L4); Obturator nerve (L2-L4);

L4-S4
-Sciatic nerve (L4-S3); Pudendal nerve (S2-S4)