Diencephalon PDF

DIENCEPHALON YOUSIF ABDALLA MBBS, MSC YOUSIF ABDALLA. MBBS, MSc includes thalamus and its.1 geniculate bodies the hypothalamus.2 the subthalamic.3 the epithalamus.4 The third ventricle lies between the halves of the diencephalon...

DIENCEPHALON YOUSIF ABDALLA MBBS, MSC YOUSIF ABDALLA. MBBS, MSc includes thalamus and its.1 geniculate bodies the hypothalamus.2 the subthalamic.3 the epithalamus.4 The third ventricle lies between the halves of the diencephalon YOUSIF ABDALLA. MBBS, MSc THALAMUS large, ovoid, gray mass of nuclei Its broad posterior end, the pulvinar, extends over the medial and lateral geniculate bodies In many individuals, there is a short interthalamic adhesion (massa intermedia) between the thalami YOUSIF ABDALLA. MBBS, MSc :White Matter ❑ The thalamic radiations The internal medullary lamina YOUSIF ABDALLA. MBBS, MSc :Thalamic Nuclei ❑ Anterior Nuclear.A : Group receives fibers from the – mamillary bodies via the mamillothalamic tract projects to the cingulate – cortex of the cerebrum B. Nuclei of the :Midline They connect with the hypothalamus YOUSIF ABDALLA. MBBS, MSc  :C. Medial Nuclei projects to the frontal cortex D. Lateral Nuclear :Mass ventral anterior – nucleus (VA) : connects with the corpus striatum ventral lateral – nucleus (VL): projects to the cerebral motor cortex YOUSIF ABDALLA. MBBS, MSc ventral posterior : – project information via the internal capsule to the sensory cortex ventral.1 posterolateral (VPL) nucleus: relays sensory input from the body ventral.2 posteromedial (VPM) nucleus, which relays sensory input from the face YOUSIF ABDALLA. MBBS, MSc  :E. Posterior Nuclei pulvinar nucleus – medial geniculate – ,nucleus receives acoustic fibers from the lateral lemniscus and inferior colliculus It projects fibers via the acoustic radiation to the temporal cortex YOUSIF ABDALLA. MBBS, MSc The lateral – geniculate nucleus is a major receives most of the fibers of the optic tract projects to the visual cortex YOUSIF ABDALLA. MBBS, MSc HYPOTHALAMUS lies below and in front of the thalamus divided into anterior portion.A (chiasmatic region) including the lamina terminalis Central hypothalamus,.B (tuber cinereum and the infundibulum posterior portion.C ( mamillary area) YOUSIF ABDALLA. MBBS, MSc Medial ❑ Hypothalamic :Nuclei supraoptic portion : supraoptic, suprachiasmatic, and paraventricular nuclei tuberal portion mamillary portion: mamillary nuclei YOUSIF ABDALLA. MBBS, MSc :Afferent Connections ❑ Though the fornix, which brings fibers from the hippocampus to the mamillary bodies emotional inputs from the prefrontal cortex visceral information from the vagal sensory nuclei from the genitalia and nipples are relayed to.the hypothalamus YOUSIF ABDALLA. MBBS, MSc :Efferent Connections ❑ Hypothalamohypophy :seal tract from the supraoptic – and paraventricular nuclei to the posterior.pituitary portal hypophyseal : system carries the – hypophyseotropic hormones from the hypothalamus to the anterior pituitary YOUSIF ABDALLA. MBBS, MSc Hypothalamospinal : tract posterolateral and dorsomedial areas : sympathetic anterior area : parasympathetic YOUSIF ABDALLA. MBBS, MSc SUBTHALAMUS lies between the dorsal thalamus and the tegmentum of the midbrain :Fiber Connections ❑ receives fibers from the globus pallidus and projects back to it. YOUSIF ABDALLA. MBBS, MSc EPITHALAMUS consists of habenular trigones.1 on each side of the – third ventricle in front of the – superior colliculus pineal body (pineal.2 gland secrete hormones that – are absorbed into its.blood vessels YOUSIF ABDALLA. MBBS, MSc YOUSIF ABDALLA. MBBS, MSc