====== HYPOTHALAMUS ====== * HYPOTHALAMUS * situation * below thalamus * boundaries or relations * anteriorly * lamina terminalis * posteriorly * subthalamus * inferiorly * structures in floor of third ventricle * superiorly * thalamus * laterally * internal capsule * medially * cavity of third ventricle * extent * divided in to two lateral halves by * third ventricle * Zones * from the point of reference i.e., anterior column of fornix * medial zone * thin subependymal or periventricular zone * thicker intermediate zone * lateral zone * Anteroposterior regions * preoptic region * preoptic nucleus * regulates release of gonadotropic hormones * supraoptic region * functionally * supraoptic nucleus * paraventricular nucleus * both * produce antidiuretic hormone * regulate water balance * connections with neurohypophysis * fibers arising from this nuclei * through hypothalamo-hypophyseal tract * project in to posterior lobe of pitutary gland * synthesize hormones * vasopressin and oxytocin * transported through axons * terminating on the capillaries in neurohypophysis * hormones are transported * anterior nucleus * regulates body temperature by dissipation of heat * stimulates parasympathetic nervous system * tuberal region * arcuate or infundibular nucleus * produces hypothalamic releasing factors * types * releasing hormones * ACTH * FSH * LH * TSH * GH * release inhibiting hormones * MSH * LTH ( Luteotropic hormone) * transported though * tubero-infundibular tract * to median eminence * from here they go through * hypothalamo hypophyseal portal system * to secretory cells of anterior lobe * ventromedial nucleus * satiety centre * stimulation inhibits the urge to eat * dorsomedial nucleus * stimulation * causes obesity * savage behaviour * mamillary region * posterior nucleus * regulates body temperature by conservation of heat * stimulate sympathetic nervous system * mamillary nuclei * receives input from hippocompal formation through fornix * lateral nucleus * stimulation induces eating * Master / Controller of * autonomic nervous system * endocrine system * sexual behaviour * Limbic system * emotional expression * biological clock * cyclical activities of body * circadian rhythm * sleeping - waking cycle * body functions rhythm * together * helps to maintain homeostasis * connections * afferent * fornix * stria terminalis * medial forebrain bundle * direct physical and chemical receptors * thalamohypothalamic * pallidohypothalamic * subthalamohypothalamic * Efferent * mamillothalamic tract * mamillotegmental tract | 911 | | Hypothalamus | Hypothalamus | | | 912 | | Area hypothalamica rostralis | Anterior hypothalamic area; anterior hypothalamic region | | | 913 | | Nucleus anterior hypothalami | Anterior hypothalamic nucleus | | | 914 | | Nucleus periventricularis ventralis | Anterior periventricular nucleus | | | 915 | | Nuclei interstitiales hypothalami anterioris | Interstitial nuclei of anterior hypothalamus | | | 916 | | Nucleus preopticus lateralis | Lateral preoptic nucleus | | | 917 | | Nucleus preoptic medialis | Medial preoptic nucleus | | | 918 | | Nucleus preopticus medianus | Median preoptic nucleus | | | 919 | | Nucleus paraventricularis hypothalami | Paraventricular nucleus | | | 920 | | Nucleus preopticus periventricularis | Periventricular preoptic nucleus | | | 921 | | Nucleus suprachiasmaticus | Suprachiasmatic nucleus | | | 922 | | Nucleus supraopticus | Supra-optic nucleus | | | 923 | | Pars dorsolateralis | Dorsolateral part | | | 924 | | Pars dorsomedialis | Dorsomedial part | | | 925 | | Pars ventromedialis | Ventromedial part | | | 926 | | Area hypothalamica dorsalis | Dorsal hypothalamic area; dorsal hypothalamic region | | | 927 | | Nucleus dorsomedialis | Dorsomedial nucleus | | | 928 | | Nucleus endopeduncularis | Endopeduncular nucleus | | | 929 | | Nucleus ansae lenticularis | Nucleus of ansa lenticularis | | | 930 | | Area hypothalamica intermedia | Intermediate hypothalamic area; intermediate hypothalamic region | | | 931 | | Nucleus dorsalis hypothalami | Dorsal nucleus | | | 932 | | Nucleus dorsomedialis | Dorsomedial nucleus | | | 933 | | Nucleus arcuatus; nucleus semilunaris; nucleus infundibularis | Arcuate nucleus; infundibular nucleus | | | 934 | | Nucleus periventricularis | Periventricular nucleus | | | 935 | | Nucleus periventricularis posterior | Posterior periventricular nucleus | | | 936 | | Area retrochiasmatica | Retrochiasmatic area; retrochiasmatic region | | | 937 | | Nuclei tuberales laterales | Lateral tuberal nuclei | | | 938 | | Nucleus ventromedialis hypothalami | Ventromedial nucleus of hypothalamus | | | 939 | | Area hypothalamica lateralis | Lateral hypothalamic area | | | 940 | | Area preoptica | Preoptic area | | | 941 | | Nuclei tuberales laterales | Lateral tuberal nuclei | | | 942 | | Nucleus perifornicalis | Perifornical nucleus | | | 943 | | Nucleus tuberomammillaris | Tuberomammillary nucleus | | | 944 | | Area hypothalamica posterior | Posterior hypothalamic area; posterior hypothalamic region | | | 945 | | Nucleus premammillaris dorsalis | Dorsal premammillary nucleus | | | 946 | | Nucleus mammillaris lateralis | Lateral nucleus of mammillary body | | | 947 | | Nucleus mammillaris medialis | Medial nucleus of mammillary body | | | 948 | | Nucleus supramammillaris | Supramammillary nucleus | | | 949 | | Nucleus premammillaris ventralis | Ventral premammillary nucleus | | | 950 | | Nucleus posterior hypothalami | Posterior nucleus of hypothalamus | | | 951 | | Organum vasculosum laminae terminalis | Vascular organ of lamina terminalis | | | 952 | | Zonae hypothalamicae | Zones of hypothalamus | | | 953 | | Zona periventricularis | Periventricular zone | | | 954 | | Zona medialis | Medial zone | | | 955 | | Zona lateralis | Lateral zone | | | 956 | | Neurohypophysis | Neurohypophysis | | | 957 | | Substantia alba hypothalami | White substance of hypothalamus | | | 958 | | Fasciculus longitudinalis posterior; fasciculus longitudinalis dorsalis [[Schütz]] | Posterior longitudinal fasciculus; dorsal longitudinal fasciculus [[Schütz]] | | | 959 | | Commissura supraoptica dorsalis [[Ganser-Meynert]] | Dorsal supra-optic commissure [[Ganser-Meynert]] | | | 960 | | Fibrae striae terminalis | Fibres of stria terminalis | | | 961 | | Fornix | Fornix | | | 962 | | Tractus hypothalamohypophysialis | Hypothalamohypophysial tract | | | 963 | | Fibrae paraventriculohypophysiales | Paraventricular fibres | | | 964 | | Fibrae supraopticohypophysiales | Supra-optic fibres | | | 965 | | Fasciculus mammillotegmentalis [[Gudden]] | Mammillotegmental fasciculus [[Gudden]] | | | 966 | | Fasciculus mammillothalamicus | Mammillothalamic fasciculus | | | 967 | | Fasciculus medialis telencephali | Medial forebrain bundle | | | 968 | | Tractus paraventriculohypophysialis | Paraventriculohypophysial tract | | | 969 | | Fibrae periventriculares | Periventricular fibres | | | 970 | | Tractus supraopticohypophysialis | Supra-opticohypophysial tract | | | 971 | | Commissura supraoptica ventralis [[Gudden]] | Ventral supra-optic commissure [[Gudden]] | | | 972 | | Tractus retinohypothalamicus | Retinohypothalamic tract | |