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26 Cards in this Set
- Front
- Back
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what type of nerve impulses does the spinothalamic pathway carry
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pain, thermal, tickle, and itch sensations and some impulses for crude, poorly localized touch and pressure, and vibration
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What is the destination of the spinothalamic pathway
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cerebral cortex
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how many neurons sets does the spinothalamic pathway have
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three sets
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First order neurons connect what
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the receptors of the neck, trunk or limbs with the spinal cord
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Where are cell bodies of the first order neurons
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the posterior dorsal root ganglia of the spinal nerves
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Where do the axon terminals of the first order neurons synapse with the second order neurons
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Posterior gray horn
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Where are the cell bodies of the second order neurons for the spinothalamic pathway
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posterior gray horns
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What do the axons of the second order neurons immediately after the synapse with the first order neuron
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decussate
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What do the axons of the spiothalamic pathway of the second order neurons do immediately after decussate
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they enter either the lateral spinothalamic tract or the anterior spinothalamic tract
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the lateral spinothalamic tract carry sensory impulse for what
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pain and temperature
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the anterior spinothalamic tract carries impulses for what
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itch, tickle, crude touch, pressure and vibration
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name the destination of all second order neurons of the spinothalamic pathway
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the ventral posterior nucleus of the thalamus
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Where are the cell bodies of the third order neurons of the anterior spinothalamic tract
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the ventral posterior nucleus of the thalamus
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Where do the third order neuron of the spinothalamic pathway
project to |
primary somatosensory area of the cerebral cortex
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name the dermatome for the face and most somatic sensation like tactile, thermal and pain from the face, nasal cavity etc
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CN V
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What type of receptors does the trigeminothalamic pathway
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encapsulated receptors and free nerve endings
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Are the axons of the of the trigeminothalamic pathway mylelinated?
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no
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Anterolateral pathway receptors are manly what?
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free nerve endings
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Anterolateral pathway sent what type of sensations?
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temperature and pain
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Are the axons of anterolateral pathways myelinated or unmyelinated
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unmyelinated
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what type of receptors does dorsal column medial lemniscus have?
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encapsulated receptors which are pacinan corpuscles and meissner corpuscles
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What type of sences do the dorsal column medial lemniscus carry
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for proprioception and it is touch and position
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are the axons of the dorsal column medial lemniscus mylenated or not
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all axons are myelinated
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Where does the second order neuron of the trigeminothalamic pathway assend to?
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the ventral posterior nucleus of the thalamus
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Where are the cell bodies for the first order neurons of the trigeminothalamic pathway
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in the trigeminal ganglion
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When the second order neuron of the trigeminothalmatic pathway synapse with the 3rd order neuron where does the 3rd order neuron travel
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primary somatosensory area of the cerebral cortex
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