Ch. 13 Spinal Cord

Spinal Cord

31 Segments

Cervical Spine 8 Pairs

Thoracic Spine 12 Pair

Lumbar Spine 5 Pair

Sacrum 5 Pair

Coccygeal 1 Pair

Cervical

8 Pairs

C1 - C8

Head and neck movement, also includes nerves for diaphragm function.

Thoracic Spine

12 Pairs

T1 - T12

Chest Muscles

Abdominal muscles

Lumbar Spine Vertebrae

5 Pairs ( L1 - L5)

Lumbar Nerves

Leg Muscles

Sacrum

5 Pairs

(S1-S5 )

Sacral nerves, bowl, bladder, sexual function

Coccygeal

1 Pair

(Co1)

Anterior Rami

Of cervical, lumbar, sacral, spinal nerve merge to form complicated networks of nerves called : Nerve Plexuses

Muscles are served by 2 more different spinal nerves

Spiral Dura Matter

attaches to the tectorial membrane and posterior longitudinal ligament

the space between the spinal dura matter and the periosteum of the vertebral column is called epidural space

filled with lose connective and adipose tissue traversed by anterior and posterior internal vertebral plexus

Spinal Arachnoid Mater

Continuous w/ the brain lies close and between the dura mater and pia mater, forming a protective layer around the spinal cord.

It is a delicate, web-like structure that contains cerebrospinal fluid in the subarachnoid space, cushioning the spinal cord and providing nourishment.

between the arachnoid and the pia matter is the subarachnoid space extending at the consus meduallaris

Spinal Mia Mater

Continuous onto the cranial pia level of the foramen magnum

closely envelopes the spinal cord giving fibrous projection called filum terminale