Thalamus Flashcards
Internal medullary lamina
Divides thalamus into 3 cell groups:
- Anterior portion
- Lateral portion
- Dorsomedial portion
Intralaminar nuclei
- Afferent
- Efferent
- Reticular formation:
- IC:
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
Anterior nucleus
- Afferent
- Efferent
- IC:
Learning, memory, emotion
- Afferent: mammillary bodies, hippocampus
- Efferent: cingulate gyrus
- IC: Ant limb
Ventral Anterior (VA) Nucleus
- Afferent
- Efferent
- IC:
Motor movement
- Afferent: substantia nigra (Dopamine)
- Efferent: prefrontal and premotor cortex
- IC: Ant limb
Ventral Lateral (VL) Nucleus
- Afferent
- Efferent
- IC:
Planned motor movements
- Afferent: globus pallidus and cerebellum
- Efferent: Primary motor, premotor and supplemental motor cortex
- IC: Ant limb
Ventral Posterior Medial (VPM) Nucleus
- Afferent
- Efferent
- IC:
P!, temp, proprioception, vibration
- Afferent: somatosensory for face and head
- Efferent: Primary somatosensory cortex (lat 3, 2, 1)
- IC: Genu
Ventral Posterior Lateral (VPL) Nucleus
- Afferent
- Efferent
- IC:
P!, temp, proprioception, vibration
- Afferent: somatosensory for UE, LE, trunk
- Efferent: Primary somatosensory cortex (lat and med 3, 2, 1)
- IC: PL
Medial Geniculate Nucleus (MGN)
- Afferent
- Efferent
- IC:
Auditory
- Afferent: Inferior colliculus
- Efferent: Primary auditory cortex (41)
- IC: Sublentiform
Lateral Geniculate Nucleus (LGN)
- Afferent
- Efferent
- IC:
Vision
- Afferent: retina
- Efferent: primary visual cortex (17)
- IC: Retrolentiform
Lateral Dorsal (LD) Nucleus
- Afferent
- Efferent
Learning and memory
- Afferent: hippocampus
- Efferent: cingulate cortex
Lateral Posterior (LP) Nucleus
- Afferent
- Efferent
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
Dorsomedial (DM) Nucleus
- Afferent
- Efferent
- IC:
Uncus
- Afferent: prefrontal cortex, olfactory and limbic
- Efferent: prefrontal cortex
- IC: Ant limb
Pulvinar Nucleus
- Afferent
- Efferent
Vision
- Afferent: Superior colliculus
- Efferent: Occipital and parietal association cortex
Thalamic reticular nucleus (TRN)
Collection of nuclei that talk to and from thalamus. Modulation
GABAergic neurons
Primary function is saliency: filters S and M info