Chapter 14 : spinal cord & spinal nerves

features of the spinal cord

• extends from the brain

  • Forman magnum to L1

consists of :

• cervical region

• thoracic region

• lumbar region

• sacral region

• coccygeal region

enlargement

expanded gray matter segments

sensory and motor innervations

interneurons

cervical enlargements

pectoral girdle & upper limbs

Lumbosacral Enlargements

pelvis & lower limbs

conus medullaris

first lumbar ( shaped like a cone )

filum terminale

became a component of the coccygeal ligaments

Cauda equina

Looks like a horses tail

posterior medial sulcus

grove on the posterior surface of the spinal cord

Anterior medial fissure

grove on the anterior surface of the spinal cord