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trulyabaker
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The spinal cord gives rise to 31 pairs of ____________________.
spinal nerves
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The bulge in the spinal cord that gives off nerves to the upper limbs is called the _________________.
cervical enlargement
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The bulge in the spinal cord that gives off nerves to the lower limbs is called the _______________________.
lumbar enlargement
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The _______________________ is a groove that extends the length of the spinal cord posteriorly.
posterior median sulcus
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In a spinal cord cross section, the posterior ___________ of the gray matter resemble the upper wings of a butterfly.
horns
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The cell bodies of motor are found in the ___________________ horns of the spinal cord.
anterior
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The ______________________ connects the gray matter on the left and right sides of the spinal cord.
gray commissure
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The __________________ in the gray commissure of the spinal cord contain cerebrospinal fluid and is continuous with the ventricles of the brain.
central canal
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The white matter of the spinal cord is divided into anterior, lateral, and posterior ________________.
funiculi
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The longitudinal bundles of nerve fibers within the spinal cord comprise major nerve pathways called _________________.
nerve tracts
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Describe:
Corticospinal
descending tract whose fibers conduct motor impulses to skeletal muscles
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Describe:
Fasciculus gracilis
ascending tract to the brain to interpet touch, pressure, and body movements
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Describe:
Lateral spinothalamic
ascending tract to the brain to give rise to sensations of temperature and pain
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Describe:
Posterior spinocerebellar
ascending tract to the cerebellum necessary for coordination of skeletal muscles
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Describe:
Reticulospinal
descending tract whose fibers conduct motor impulses to sweat glands and muscles to control tone
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Describe:
Arachnoid mater
thin, weblike middle membrane
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Describe:
Denticulate ligament
band of pia mater that anchors dura mater to cord
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Describe:
Dural sinus
channel through which venous blood flows
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Describe:
Dura mater
outermost layer of meninges
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Describe:
Epidural space
seperates dura mater from bone of vertebra
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Describe:
Pia mater
follows irregular contrours of spinal cord surface
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Describe:
Subarachnoid space
contains cerebrospinal fluid
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