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Functional Neuroanatomy Exam 2 Questions and answers | Newest
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Functional Neuroanatomy Exam 2 Questions and answers | Newest
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Functional Neuroanatomy Exam 2Questions and answers | Newest
function of PCML pathway - sensory (vibration, joint position, fine touch)
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II function of anterolateral pathway - sensory (pain, temperature, crude touch)
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II somatosensory pathway site of origin - peripheral nervous system II II II II II II II II II II
PCML pathway sites of neurons - !st: dorsal root ganglion
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2nd: medulla II
3rd: VPL in thalamus
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4th: primary somatosensory pathway
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anterolateral pathway sites of neurons - !st: dorsal root ganglion
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2nd: dorsal horn II II
3rd: VPL in thalamus
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4th: primary somatosensory pathway
II II II
II what is present in the spinal cord - decussation for anterolateral pathway
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what is present in the medulla - 1) cuneate/gracilis fasiculi and nuclei for PCML
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2)decussation for PCML II II
what is present in the thalamus - VPL posterior for both anterolateral and PCML
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pathways
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cuneate fasiculus - -bellybutton up
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-synapses onto cuneate nuclei in the medulla II II II II II II
gracile fasiculus - -bellybutton down
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-synapses onto the gracile nuclei in the medulla II II II II II II II
PCML decussation - internal arcuate (axons traveling up are the medial leminscus
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pathways)
II
3 anterolateral pathway tracts - 1) spinothalamic
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2) spinoreticular
II
3) spinomesencephalic
II
II anterolateral decussation - anterior commissure II II II II II II
, primary somatosensory cortex - -basic processing of tactile information originating from
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the skin, muscles, and joints
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-contralateral
-encodes type and intensity of sensory inputs II II II II II II
secondary somatosensory cortex - -tactile information & information concerning limb
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position creates representations of the texture and size of objects
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-contralateral and ipsilateral II II
-tactile learning and memory II II II
II thalamus - major processing center & sensory relay station
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examples of types of input the thalamus conveys to the cortex - -motor inputs from the
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cerebellum and basal ganglia
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-inputs involved in sleep and arousal
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II corticothalamic projections - cortical areas which send axons back to the thalamus II II II II II II II II II II II II II
relay nuclei - receive input from many brain regions and projects them to the cortex (also
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receives info. back from cortex)
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intralaminar nuclei - receives information from basal ganglia and projects it back to the
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basal ganglia, as well as the cortex
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reticular nuclei - receives inputs from other thalamic nuclei and cortex and projects it
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back to the thalamus (doesn't project to cortex)
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II posterior fossa - where brainstem lies II II II II II II II
II midbrain-diecephalic junction - rostral limit of brainstem II II II II II II II II
II cervicomedullary junction - caudal limit of brainstem II II II II II II II II
II foramen magnum - where cranial nerves enter the brainstem
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midbrain (dorsal side) - -tectum: dorsal surface of the brainstem contains superior and
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inferior colliculi
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-responsible for auditory & visual reflexes II II II II II
II midbrain (ventral side) - contains cerebellar penduncles
II II II II II II II II
II pons - cerebellum sends white matter tracts celled cerebellar penduncles to the pons
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II medulla - contains the pyramidal decussation on the ventral side
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II CN I-olfactory nerve function - detection of smell
II II II II II II II II II
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