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16 Cards in this Set
- Front
- Back
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spinal cord, grey & white matter |
grey is organised in a "H" shape white surrounds is |
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grey matter |
organised in horns - 3 horns (post, ant, lat) horns are composed of neurons (nuclei) |
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the nuclei are divided into 4 groups |
somatomotor nuclei (ant horn) somatosensory nuclei (post horn) visceromotor and viscerosensory nuclei (lateral horn) |
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post horn |
contains sensory centres -nucleus proprius (protopathic sensation) nucleus dorsalis (of clarke) (proprioception) |
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protopathic sensation |
sensation of pain temp pressure |
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proprioception |
sensation of muscle tone |
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lateral horn |
visceromotor + viserosensory nuclei (vegetative functions)
intermediomedial nucleus intermediolateral nucleus |
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anterior horn |
motor centres (motorneurons) - 2 types
alpha motoneurons - impulses to contract muscles
beta motoneurons - for control of muscle tone |
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white matter |
on the outside; around the grey matter separated into funiculi - 3 (ant, lat, post) contain nerve pathways of the spinal cord (asc + desc tracts) |
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white matter contains tracts - asc pathways |
anterolateral funiculus posterior funiculus lateral funiculus |
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anterolateral funiculus |
lat spinothalamic tract ant spinothalamic tract |
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posterior funiculus |
fasciculus gracilis fasciculus cuneatus |
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lateral funiculus |
post spinocerebellar tract anterior spinocerebellar tract olivospinal tract |
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descending tract |
pyramidal tract extrapyramidal tract |
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pyramidal tract |
corticospinal tract corticonuclear tract |
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extrapyramidal tract |
vestibulospinal tract oliviospinal tract reticulospinal tract rubrospinal and tectospinal tract - terminate in cervical spinal cord and only influence the motor system of the head and upper limb |
