Spinal Cord:

a major reflex center.

Spinal Cord: Gross Anatomy and Protection:

extends from foramen magnum

to 1st or 2nd lumbar vertebra.

Spinal Cord: Gross Anatomy and Protection:  Bone, CSF, meninges protect similar to brain EXCEPT: Dura:

is called spinal dural sheath

and is a single layer.

Spinal Cord: Gross Anatomy and Protection:  Bone, CSF, meninges protect similar to brain EXCEPT: Epidural Space:

contains fat and loose CT.

Spinal Cord: Gross Anatomy and Protection:  Bone, CSF, meninges protect similar to brain EXCEPT: Conus Medullaris:

cone shaped terminus (end) of cord.

Spinal Cord: Gross Anatomy and Protection:  Bone, CSF, meninges protect similar to brain EXCEPT: Filum Terminale:

extension of pia that extends below

conus to attach to coccyx.

Spinal Cord: Gross Anatomy and Protection:  Bone, CSF, meninges protect similar to brain EXCEPT: Denticulate Ligaments:

lateral extensions of pia that

anchors spinal cord to dura.

Nerve roots lie on either

side (doral & ventral).

Spinal Cord: Gray Matter:

shaped like an "H" or butterfly

within the spinal cord.

Spinal Cord: Gray Matter:

Gray Commissure:

the cross bar of the "H."

Spinal Cord: Gray Matter:

Anterior (ventral) Horns:

contain motor neuron cell bodies.

Spinal Cord: Gray Matter:

Posterior (dorsal) Horns:

contain association neuron cell bodies.

Spinal Cord: Gray Matter:

Posterior (dorsal) Horns:

Dorsal Spinal Roots:

contain ganglia which house

sensory cell bodies.

Spinal Cord: Gray Matter:

Later Horns:

small segment of gray in

thoracic and lumbar areas.

Visceral efferents.