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LAB #13: HYPOTHALAMUS, AUTONOMIC NERVOUS SYSTEM (ANS), BRAINSTEM VISCERAL CENTERS, AND VISCERAL AFFERENT SYSTEMS Haines 2-28 Median Eminence In the tuber cinereum Floor of Hypothalamus TO RIGHT : Midsagittal section through the hypothalamus (highly magnified) to show regional names for specializations of the hypothalamus and stalk of the hypophysis. Haines 3-7 Haines 2-16 Circle of Willis – “which is really a pentagon” Aaron Stafford Circa 2004 Haines 5-35a Anterior Horn of Lateral Ventricle Fornix Paraventricular Nuclei Supraoptic Nuclei Anterior Comissure Preoptic area of hypothalamus - GnRH Suprachiasmatic Nuclei 3rd Infundibular Stalk Optic Tract Haines 5-35a Lateral Hypothalamus Basal Forebrain Medial Forebrain Bundle Haines 5-35a Anterior Horn of Lateral Ventricle Fornix Paraventricular Nuclei Supraoptic Nuclei Anterior Comissure Preoptic area of hypothalamus - GnRH Suprachiasmatic Nuclei 3rd Infundibular Stalk Optic Tract CORONAL SLICE THROUGH THE PARAVENTRICULAR NUCLEUS Blackboard 24 Magnocellular secreting neurons – project to the spinal cord and posterior hypophysis (neurohypophysis) ADH Also made in magnocellular neurons and sent via axons to neurohypophysis Haines 5-34 Septum Pellucidum Fornix Lateral Ventricle 3rd Medial forebrain Bundle Optic tract Middle Hypothalamus Haines 5-30 Pulvinar Centromedian Nucleus Dorsomedial Nucleus VPL VPM Hypothalamus Fornix Thalamus Mammilothalamic Tract Anterior Nucleus Haines 5-32 3rd Mammilary Body Mammilothalamic tract Haines 5-31a Insular Cotex Haines 5-25 Dorsal Longitudinal Fasciculus in PAG PAG Eddinger Westphal Nucleus Rostral Midbrain Level Dorsal Longitudinal Fasciculus in PAG Haines 5-20 parabrachial nucleus Rostral Pons Level Blackboard 23 Dorsal Longitudinal Fasciculus in PAG Motor Nucleus of CN10 (Very pale) Solitary Nucleus and tract - taste Lateral Descending Hypothalamic System Haines 5-3 Descending Hypothalamic System Intermediolateral horn Thoracic Level Haines 5-1 Descending Hypothalamic System Sacral Parasympathetic Nuclei – in the intermediate zone Sacral Level Haines 2-20 stria stria Haines 2-12 Uncus = primary olfactory cortex, and is the only sensory path that does not synapse in the thalamus before getting to the cortex Haines 5-37a Ventromedial Prefrontal cortex = Olfactory Tract medial prefrontal cortex +Orbitofrntal cortex Haines 5-35a Lateral Olfactory Stria Amygdala
