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