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32 Cards in this Set
- Front
- Back
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Conus medullaris
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by lumbar region
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Ascending tracts |
sensory |
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Descending tracts |
motor |
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cauda equina syndrome |
serious neurologic condition from damage to cauda equina causing severe back pain, saddle anesthesia, bladder/bowel/sexual disfunction, and can causes tumors, trauma, etc. |
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shingles |
painful rash caused by herpes zoster virus, distributed in bands |
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features of the spinal cord |
passes through foramen magnum; extends from brain to L1 |
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spinal cord consists of (regions)... |
Cervical region, Thoracic region, Lumbar region, Sacral region, Coccygeal region, Cervical enlargement, Lumbosacral enlargement, Conus medullaris, Cauda equina, Filum terminale (becomes a component of the coccygeal ligament), Posterior median sulcus, Anterior median fissure
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cervical and lumbar enlargements |
areas where many nerves innervate limbs and amount of gray matter is increased |
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spinal cord |
consists of 31 segments |
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spinal segments |
consists of dorsal root, ventral root, dorsal root ganglia, spinal nerve |
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sensory (afferent) nerves |
transmit impulses towards spinal cord |
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Motor (efferent) nerves |
transmit impulses away from spinal cord |
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spinal meninges |
continuous with cranial (cerebral) meninges and composed of detenculate ligaments to help hold spinal cord in position |
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meningitis |
inflammation of the meninges |
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spinal meninges layer |
dura mater (tough outermost layer), arachnoid mater (middle layer), pia mater (inner layer) |
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dura mater |
tough fibrous outermost layer that stabilizes spinal cord within vertebral canal |
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arachnoid layer |
middle meningeal layer, separated from pia by subarachoid space, cerebrospinal fluid flows within here |
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pia mater |
deepest meningeal layer firmly bound to brain tissue and spinal cord tissue |
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gray matter spinal cord |
central canal, somas surrounding canal, glial cells |
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white matter spinal cord |
axons, nerves, outside gray matter |
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somas |
sensory and motor nuclei |
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posterior gray horns |
somatic sensory and viseral nuclei |
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lateral gray horns |
visceral motor nuclei |
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anterior gray horns |
somatic motor nuclei |
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gray commissure |
consists of axons crossing from one side to the other |
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white matter posterior columns |
sensory and motor tracts |
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31 spinal nerves |
8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal |
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peripheral nerve |
epineurium (outer layer), perineurium (layer surrounding fascicle), endoneurium (layer surrounding single axon) |
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rami communicantes |
innervates smooth muscles, glands, organs and sensation from internal organs |
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dorsal ramus |
innervates skeletal muscles of back and neck, sensation from back and neck |
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ventral ramus |
innervates skeletal muscles of limbs, sensation from limbs |
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dermatomes |
each pair of spinal nerves monitors specific surface areas |
