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19 Cards in this Set
- Front
- Back
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Rexed lamina I
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marginal zone
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rexed lamina II
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substantia gelatinosa
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rexed laminae III and IV
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most of the nucleus proprius
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rexed laminae V and VI
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-occupy the base of the posterior horn
-can be subdivided into medial and lateral compartments -important for integration of somatic information and as reflex centers |
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rexed laminae VII
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-intermediate gray matter
-includes dorsal nucleus of Clark and intermdiolateral and intermediomedial cell columns -source of spinocerebellar fibers (DSCT) |
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anterior horn laminae
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VIII and IX
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rexed laminae VIII
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contains interneurons and tract cells
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rexed lamina IX
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lateral and medial motor columns
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rexed lamina X
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gray commissure
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Cervical enlargement
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C4 to T1
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lumbosacral enlargement
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L1 to S2
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The Posterior horn receives sensory information from?
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-exteroceptors (GSA) I-V
-proprioceptors (GSA) V-VI -interoceptors (GVA) I, V-VI |
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The posterior horn receives descending input from these supraspinal centers?
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-cerebral cortex
-sucortical areas |
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Dorsal (posterior) columns
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-fasciculus gracilis
-fasciculus cuneatus -ipsilateral relay of primary sensory information of: 1. conscious proprioception 2. tactile position 3. vibratory sense 4. deep touch |
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Anterolateral system is composed of?
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1. spinothalamic
2. spinomesencephalic 3. spinoreticular 4. spinohypothalamic |
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Anterolateral system (ALS)
relays and damage to causes? |
relays: pain, temperature, crude touch
loss of these sensations on the contralateral side of the body beginning 1-2 segments below the level of the lesion |
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Dorsal (posterior) spinocerebellar tract
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-fibers originating from Clark's nucleus (so found above levels L2, L3)
-ipsilateral pathway -unconscious proprioception from spinal cord to cerebellum |
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Ventral (anterior) spinocerebellar tract
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-arises from laminae V-VIII
-contralateral -unconscious proprioception |
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Ascending Tracts
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-gracile and cuneate fasciculi
-posterior (dorsal) spinocerebellar tract -anterior (ventral) spinocerebellar tract -anterolateral (ventrolateral) system ALS |
