neural pathways Flashcards
dorsal column pathway
conscious touch and proprioception
spinothalamic pathway
pain and temp
spinoreticular path
subconscious alerting and arousal to pain and temp
spinocerebellar pathway
unconscious proprioception
cortocospinal pathway
voluntary movement and fine motor control
rubrospinal pathway
gross motor
reticulospinal pathway
postural control, trunk movement
vestibulospinal pathway
trunk movement, postural control
tectospinal pathway
reflexive movement of head turning towards a sound
cortiobulbar pathway
voluntary control of motor CNs
describe path of dorsal column
begins in periphery, goes up to same side dorsal horn of sc then goes up to same side medulla via dorsal column pathway, then synapses in medulla and crosses over to opposite side and continues travelling up via the medial lemniscus pathway to the contralateral side (of where stimuli first was) thalamus and then on up to the primary sensory cortex.
describe the spinothalamic pathway
pain and temp info comes in from periphery and synapses immediately on the same side of the dorsal horn of the spinal cord, then it crosses over to the other side of the SC and ascends via the spinothalamic tract to the thalamus and synapses there before ascending to the sensory cortex
describe the corticospinal tract
cell bodies in the motor cortex generate an action signal, that signal goes to the same side medullary pyramid and then crosses over there to the other side and descends in the lateral column to an alpha motor neuronon the ventral horn of the SC and then out to the mm to perform the action
describe the rubrospinal pathway
cell bodies in the red nucleus (of the midbrain) generate a gross motor action signal, it crosses immediately to the opposite side and travels down to the alpha motor neuron in the ventral horn of the sc and then out to the mm to produce that movement
review input/output diagrams
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