Thalamus Flashcards

1
Q

Internal medullary lamina

A

Divides thalamus into 3 cell groups:

  • Anterior portion
  • Lateral portion
  • Dorsomedial portion
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2
Q

Intralaminar nuclei

  • Afferent
  • Efferent
  • Reticular formation:
  • IC:
A

Learned/new motor movements

  • Afferent: reticular formation, basal ganglia, limbic system
  • Efferent: cerebral cortex and basal ganglia
  • Reticular formation: arosal and awareness. Filters out S info so only most useful to survival is perceived
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3
Q

Anterior nucleus

  • Afferent
  • Efferent
  • IC:
A

Learning, memory, emotion

  • Afferent: mammillary bodies, hippocampus
  • Efferent: cingulate gyrus
  • IC: Ant limb
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4
Q

Ventral Anterior (VA) Nucleus

  • Afferent
  • Efferent
  • IC:
A

Motor movement

  • Afferent: substantia nigra (Dopamine)
  • Efferent: prefrontal and premotor cortex
  • IC: Ant limb
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5
Q

Ventral Lateral (VL) Nucleus

  • Afferent
  • Efferent
  • IC:
A

Planned motor movements

  • Afferent: globus pallidus and cerebellum
  • Efferent: Primary motor, premotor and supplemental motor cortex
  • IC: Ant limb
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6
Q

Ventral Posterior Medial (VPM) Nucleus

  • Afferent
  • Efferent
  • IC:
A

P!, temp, proprioception, vibration

  • Afferent: somatosensory for face and head
  • Efferent: Primary somatosensory cortex (lat 3, 2, 1)
  • IC: Genu
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7
Q

Ventral Posterior Lateral (VPL) Nucleus

  • Afferent
  • Efferent
  • IC:
A

P!, temp, proprioception, vibration

  • Afferent: somatosensory for UE, LE, trunk
  • Efferent: Primary somatosensory cortex (lat and med 3, 2, 1)
  • IC: PL
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8
Q

Medial Geniculate Nucleus (MGN)

  • Afferent
  • Efferent
  • IC:
A

Auditory

  • Afferent: Inferior colliculus
  • Efferent: Primary auditory cortex (41)
  • IC: Sublentiform
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9
Q

Lateral Geniculate Nucleus (LGN)

  • Afferent
  • Efferent
  • IC:
A

Vision

  • Afferent: retina
  • Efferent: primary visual cortex (17)
  • IC: Retrolentiform
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10
Q

Lateral Dorsal (LD) Nucleus

  • Afferent
  • Efferent
A

Learning and memory

  • Afferent: hippocampus
  • Efferent: cingulate cortex
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11
Q

Lateral Posterior (LP) Nucleus

  • Afferent
  • Efferent
A

Calls visual attention to peripheral, no participation in visual pathway

  • Afferent: superior colliculus, primary visual/auditory, somatosensory cortex
  • Efferent: posterior parietal and lateral temporal association cortex
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12
Q

Dorsomedial (DM) Nucleus

  • Afferent
  • Efferent
  • IC:
A

Uncus

  • Afferent: prefrontal cortex, olfactory and limbic
  • Efferent: prefrontal cortex
  • IC: Ant limb
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13
Q

Pulvinar Nucleus

  • Afferent
  • Efferent
A

Vision

  • Afferent: Superior colliculus
  • Efferent: Occipital and parietal association cortex
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14
Q

Thalamic reticular nucleus (TRN)

A

Collection of nuclei that talk to and from thalamus. Modulation

GABAergic neurons
Primary function is saliency: filters S and M info

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