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Spinal Cord vocab
n/a
24
Anatomy
10th Grade
01/19/2011

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Term
Meninges
Definition
3 layers of specialized membranes surrounding the brain and spinal cord
Term
Dura Mater
Definition
outermost covering of the central nervous system (CNS)
Term
Epidural Space
Definition
contains loose conective tissue, blood vessels and adipose tissue
Term
Subdural Space
Definition
seperates the inner surface of the dura mater from the second meningeal layer
Term
Arachnoid (mater)
Definition
the second meningeal layer
Term
Subarachnoid Space
Definition
contains a delicate web of collagen and elastic fibers
(seperates arachnoid and pia mater)
Term
Cerebrospinal fluid (CSF)
Definition
acts as a shock absorber and transports dissolved gases, nutrients, chemical messages, and waste prducts
Term
Pia Mater
Definition
inermost meningeal layer
Term
Spinal Cord
Definition
connects to 31 pairs of spinal nerves
Term
Cervical Enlargement
Definition
supplies nerves to the shoulder girdles and upper limbs
Term
Lumbar Enargement
Definition
Provides innervation to the pelvis and lower limbs
Term
Central Canal
Definition
a narrow internal passageway filled with cerebrospinal fluid
Term
Posterior Median Sulcus
Definition
shallow groove in the posterior surface of the spinal cord
Term
Anterior Median Fissure
Definition
deep groove in the anterior surface of the spinal cord
Term
Dorsal Roots
Definition
contain the axons of neurons also bringing sensory info to the spinal cord
Term
Ventral roots
Definition
contain axons of CNS motor neurons that control muscles and glands
Term
Spinal Nerves
Definition
bind roots together
Term
Gray Matter
Definition
unmyelinated
Term
White Matter
Definition
myelinated
Term
Posterior Gray Horns
Definition
contains sensory nuclei
Term
Anterior Gray Horns
Definition
involved in the motor control of skeletal muscles
Term
Gray commissure
Definition
anterior and posterior to the cantral canal. Also interconnect the horns on either side of the spinal cord
Term
Ascending tracts
Definition
carry sensory info toward brain
Term
Descending tracts
Definition
convey motor commands into the spinal cord
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