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Thalamus & Cerebral Cortex

Thalamus & Cerebral Cortex. Avinash Bharadwaj ANHB 2217 – 2006. The Diencephalon. Thalamus A miniature brain! Hypothalamus Visceral, limbic and neuroendocrine functions Epithalamus Pineal “Metathalamus” Really, a part of the thalamus – special sensory functions Subthalamus

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Thalamus & Cerebral Cortex

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  1. Thalamus&Cerebral Cortex Avinash Bharadwaj ANHB 2217 – 2006

  2. The Diencephalon • Thalamus • A miniature brain! • Hypothalamus • Visceral, limbic and neuroendocrine functions • Epithalamus • Pineal • “Metathalamus” • Really, a part of the thalamus – special sensory functions • Subthalamus • Part of motor control systems, between thalamus and midbrain.

  3. The Thalamus • Part of the diencephalon • Topographically • Between midbrain and the cerebral cortex • Major ascending and descending fibre systems : • Internal capsule  corona radiata • Relationship with corpus striatum

  4. Topography

  5. Nuclear Masses • Internal medullary lamina • Anterior • Lateral • Dorsal and posterior • Pulvinar • Medial • Geniculate bodies • Reticular nuclei • Terminology and problems…! • Miniature brain

  6. Nuclear Masses • Ventral posterior • Sensory relay station • Somatic, taste, vestibular • VP-M (Head), VP-L • Somatotopism • VL • Aff : Cerebellum, pallidum • Eff : Motor areas • VA • Pallidum, motor cortex • Posterior (incl pulvinar) and intralaminar • Pain perception

  7. Nuclear Masses • LP • Somatosensory association cortex • Limbic Connections • MD, LD, Anterior • LGB • Visual pathway • MGB • Auditory pathway

  8. Cerebral Cortex • General topography – lobes, gyri, sulci • Functional localisation • Blood supply and its implications • Histology • Neuron types • Layers • Connections • “Cortical cytoarchitecture” • Cortex and higher functions, hemispheric specialisation…

  9. General Topography • Frontal, parietal, occipital and temporal lobes • “Limbic lobe and system” • Lateral, central, calcarine and other sulci • Lab exercises and website.

  10. Functional Localisation • General sensory • Motor – Frontal lobe and others • Auditory – temporal lobe • Visual – occipital lobe • Language areas • Sensory integration • Sounds and sights, words and concepts • Motor speech area

  11. A C A M C A P C A Localisation and Blood Supply Map functional areas! Last Slide

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