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20 Cards in this Set
- Front
- Back
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What is a funiculus?
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Large region of white matter in spinal cord
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What is a fasciculus?
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Fibres from common origin going to common destination
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Where does sensory information come from and to in conscious proprioception?
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Intero, extero and proprioceptors -> contralateral cerebral cortex and cerebellum and ARAS for arousal
(waking in night due to noise) |
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What is general proprioception?
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Sense of the relative position of body parts -> conscious and subconscious
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What does a deficit in general proprioception give?
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Ataxia and an inconsistent gait
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What is the neuron pathway for proprioception and nociception?
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First neuron in spinal ganglion
Second neuron decussates (normally) and synapses in thalamus Third neuron in thalamus and goes to primary somatic sensory cortex |
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Which nucleus in the thalamus is responsible for visual and auditory input?
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Visual - lateral geniculate nucleus
Auditory - medial geniculate nucleus |
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Where is the pathway for conscious proprioception in the spinal cord?
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Dorsal funiculus
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Where does the synapse occur for conscious proprioception for the thoracic limbs?
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Medial cuneate nucleus - medulla oblongata
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Where does the synapse occur for pelvic limbs?
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Gracilis nuclei - medulla oblongata
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What may a noxious stimulus have the effect of?
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Reflex or to multisynaptic pathway to brain
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What is the definition of "pain"?
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Conscious perception of noxious stimulus followed by an unpleasant emotional response
Hence why it is nociception in animals |
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What does loss of nociception suggest?
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Severe destruction of the spinal cord
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What is the neuron pathway for nociception?
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Neuron 1 - spinal ganglion
Neuron 2 - substantia gelatinosa in dorsal horn of spinal cord Neuron 3 - thalamus - contralateral ventral group of nuclei |
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What are the effects on a limb in pain?
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Flexion while extension inhibited
Other limb is extended |
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Bad nociception reflexes implies
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LMN lesion
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What does the substantia gelatinosa turn into more cranially?
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Spinal tract of V
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Which pathway is this?
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Proprioception
Spinal ganglion Dorsal funiculus Medial cuneate and gracilis nuclei DECUSSATION Thalamus |
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Which pathway is this?
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Nociception/temperature
Spinal ganglion Dorsal horn - substantia gelatinosa - Deep spinothalamic pathways DECUSSATION Thalamus |
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nociception - substantia gelatinosa
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proprioception - dorsal funiculus
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