Dorsal Thalamus Medical Neuroscience Dr Wiegand The Diencephalon

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Dorsal “Thalamus” Medical Neuroscience Dr. Wiegand

Dorsal “Thalamus” Medical Neuroscience Dr. Wiegand

The Diencephalon

The Diencephalon

The Diencephalon Interthalamic adhesion Thalamus Epithalamus (Pineal & Habenula) Hypothalamus Pituitary Subthalamus

The Diencephalon Interthalamic adhesion Thalamus Epithalamus (Pineal & Habenula) Hypothalamus Pituitary Subthalamus

The “Dorsal” Thalamus Sensory integration nucleus – gateway to the cerebral cortex ¢ Afferents

The “Dorsal” Thalamus Sensory integration nucleus – gateway to the cerebral cortex ¢ Afferents from both rostral and caudal central nervous system structures ¢ Efferents primarily to cerebral cortex via four principal “radiations” ¢ Associated with motor, sensory, limbic and vegetative functions ¢

Medial n. Lateral n. 3 rd Ventricle * * Interthalamic adhesion Internal medullary lamina

Medial n. Lateral n. 3 rd Ventricle * * Interthalamic adhesion Internal medullary lamina Internal capsule Anterior n. External medullary lamina Reticular n.

General Organization medial nuclei lateral nuclei anterior nuclei internal medullary lamina

General Organization medial nuclei lateral nuclei anterior nuclei internal medullary lamina

dorsal tier pulvinar geniculate bodies ventral tier

dorsal tier pulvinar geniculate bodies ventral tier

Frontal Section intralaminar nuclei 3 rd Ventricle internal medullary lamina reticular nuclei external medullary

Frontal Section intralaminar nuclei 3 rd Ventricle internal medullary lamina reticular nuclei external medullary lamina

Thalamic Nuclei ¢ ¢ Anterior Lateral l Dorsal Tier • lateral dorsal • lateral

Thalamic Nuclei ¢ ¢ Anterior Lateral l Dorsal Tier • lateral dorsal • lateral posterior • pulvinar l Ventral Tier • ventral anterior • ventral lateral • ventral posterior (VLP & VPM) • posterior nucleus

Thalamic Nuclei ¢ Medial l l ¢ ¢ medial/medial dorsal midline nuclei Pulvinar Geniculate

Thalamic Nuclei ¢ Medial l l ¢ ¢ medial/medial dorsal midline nuclei Pulvinar Geniculate bodies Reticular Intralaminar l l centromedian parafasciular

Specific Sensory Nuclei afferent nucleus efferent function Dorsal Column & Anterolateral System VPL Postcentral

Specific Sensory Nuclei afferent nucleus efferent function Dorsal Column & Anterolateral System VPL Postcentral Gyrus Somesthesis Trigeminal System VPM Postcentral Gyrus Somesthesis Inferior Colliculus MGB Temporal lobe Hearing Retina LGB Occipital lobe Vision

Specific Cortical Relay Nuclei afferent nucleus efferent function Cerebellum VL Precentral Gyrus & Frontal

Specific Cortical Relay Nuclei afferent nucleus efferent function Cerebellum VL Precentral Gyrus & Frontal cortex Movement & Motor Planning Globus Pallidus VA Premotor Cortex Motor Planning

Specific Association Nuclei afferent nucleus efferent function Hypothalamus Anterior Cingulate Limbic Amygdala MD Prefrontal

Specific Association Nuclei afferent nucleus efferent function Hypothalamus Anterior Cingulate Limbic Amygdala MD Prefrontal Cortex Limbic Hypothalamus & Cingulate LD Cingulate Emotions Parietal lobe & Sup. Colliculus LP Parietal Cortex Sensory integration Anterolateral System Posterior Insula, Cingulate and Association Cortices Pain Sup. Colliculus Pulvinar Temporal, Parietal and Occipital Lobes Vision

Non-Specific Nuclei afferent nucleus efferent function Reticular Formation Midline Motor / Premotor Basal Ganglia

Non-Specific Nuclei afferent nucleus efferent function Reticular Formation Midline Motor / Premotor Basal Ganglia & Reticular Formation Intralaminar Striatum & Cortex Motor Integration Cortex & Brainstem Reticular Thalamus Thalamic Modulation Entire Cortex Arousal/Limbic

Caudate Nucleus Lentiform Nuclei Thalamus Internal Capsule

Caudate Nucleus Lentiform Nuclei Thalamus Internal Capsule