Chapter15-2-2小脑和间脑例析.ppt

The Nervous System Inferior cerebellar peduncle －Connect with medulla and with spinal cord, contain both afferent and efferent fibers Middle cerebellar peduncle －Connect with pons, contain afferent fibers Superior cerebellar peduncle －Connect with midbrain, contain mostly efferent fibers Vestibulocerebellum Archicerebellum Flocculonodular lobe Spinocerebellum Paleocerebellum Vermis and the anterior portions of the hemispheres Cerebrocerebellum Neocerebellum Lateral zone Vestibulocerebellum Connections Afferents: Receive input from vestibular nuclei and primary vestibular Efferents: Projects to the vestibular nucleus → vestibulospinal tract and medial longitudinal fasciculus → motor neurons of anterior horn Function: Involved in eye movements and maintain balance Cerebrocerebellum Connection Cerebrum Function: Participates in planning movements Doral thalamus Metathalamus Epithalamus Subthalamus Hypothalamus A large egg-shaped nucleus mass, Anterior end ---- anterior thalamic tubercle, Posterior end ---- pulvinar Right and left portion of thalamus are joined by interthalamic adhesion Floor－Hypothalamic sulcus Three nuclear group－Divided by internal medullary lamina Anterior nuclear group Medial nuclear group Lateral nuclear group Nonspecific nuclei－Receive afferents from Dinencephalon and reticular formation of brain stem, project mainly to hypothalamus and corpus striatum Midline nucleus group Intralaminar nuclear group Thalamic reticular nucleus Association nuclei－Receive input from many converging and in turn project widely to the association areas of cerebral cortex Anterior nuclear group Medial nuclear group Dorsal tier of lateral nuclear group Special relay nuclei Ventral anterior nucleus (VA) Ventral intermediate nucleus (VI) Receiving dentate nucleus, globus pallidus and substantia nigra to motor cortex Ventral posteromedial nucleus (VPM) －Receives trigemin