Ch 12 Spinal Cord

Dorsal horns vs. Ventral horns

dorsal horn - interneurons that receive sensory input ventral horn - motor neurons exit spinal cord

Dorsal roots vs. Ventral roots

dorsal roots: sensory input to spinal cord ventral roots: somatic and autonomic motor output to peripheral body

The meninges in the brain (CNS) are the (from outside to inside)

dura mater arachnoid mater pia mater

The epidural space can be used for

epidural anesthesia

In the spinal cord the ___________ _________ is a cushion of fat and network of veins

epidural space

Where the pia mater extends to the coccyx which anchors the spinal cord

filium terminale

________ matter functions in innervating skeletal muscles by somatic nerves and innervating smooth and cardiac muscles by autonomic nerves

gray

_________ matter functions in receiving sensory information from peripheral

gray

__________ _________ connects masses of gray matter and encloses the central canal

gray commissure

Which matter (white or gray) deals with stretch reflex?

gray; no white matter involved

White matter vs grey matter

grey matter: cell bodies of spinal cord white matter: nerve fiber tracts

The spinal cord is located (part of vertebrae)

within vertebral foramen, NOT the vertebral foramina

In the white matter, what lies on the dorsal side of the spinal cord

Ascending sensory tract

In the white matter, what lies on the ventral side of the spinal cord?

Descending motor tract

The spinal cord meninges are (from outside to inside)

Dura mater Arachnoid mater Pia mater

cerebrospinal fluid collection below

L3

The spinal cord begins and ends at the

begins at foramen magnum of occipital bone and ends at conus medullaris (L1 or L2)

A bundle of spinal nerve roots that arise from conus medullaris

cauda equina

Lumbar and sacral nerve fibers

cauda equina

_________ ____________ penetrates dura mater and arachnoid mater

cerebrospinal fluid CSF

What is CSF and where is it located

cerebrospinal fluid and in subarachnoid space

Grey matter is ______ for brain and ________ for spinal cord

outside for brain inside for spinal cord

Dorsal and ventral roots unite to form _________ _________ via the _________ _________

spinal nerves via the intervertebral foramina

The epidural space is between....

vertebrae and spinal dura mater

dorsal and ventral root are within the

vertebral foramen

In _________ _________, nerve tracts allow communication between grey matter and brain

white matter