Hypothalamus Flashcards
Hypothalamus…. 3rd ventricle
Surrounds
Name each part of the diencephalon
Rostral limit hypothalamus
Lamina Terminalis
Caudal limit of the hypothalamus
Midbrain (no clear limit)
Dorsal limit of the hypothalamus
Hypothalamic sulcus
Ventral limit hypothalamus
Cranial base
Medial limit hypothalamus
3rd ventricle
Lateral limits hypothalamus
Substantia innominata and posterior limb of the internal capsule
Name the regions of the hypothalamus
Name the parts of the hypothalamus
- Periventrocular zone
- Lateral hypothalamic area
In the lateral hypothalamic area, we find…
Fibers: medial prosencephalic bundle
Disperse neurons: orexin neurons, lateral hypothalamic nerve, tuberal nerve
Medial hypothalamus regions
VISCERAL AFFERENTS (VEGETATIVE SYSTEM) THAT PROJECT INTO THE HYPOTHALAMUS COME FROM…
NTS, PARABRACHIAL NUCLEUS, PERIAQUEDUCTAL GRAY MATTER
VISCERAL EFFERENTS FROM THE HYPOTHALAMUS SEND PROJECTIONS TO …
Dorsal motor nucleus (vagus nerve and nucleus ambiguus)
Hippocampal afferences and efferences are related to
Memory
Lambic afferences and efferences are related to…
Emotions
Hippocampal afferences and efferences pass through the… before reaching the cortex
Anterior thalamic nucleus
Limbic afferences and efferences pass trough the … before reaching the cortex
Dorsomedial nucleus of the thalamus
Scheme of vegetative system hypothalamus
Hippocampal system (hypothalamus) scheme
Limbic system scheme (hypothalamus)
Can emotions influence the vegetative system?
Yes they can, that is why we can sometimes be hungry when being anxious or viceversa.
Name the functions of the hypothalamus
Hormonal control, biological rhythms (sleep, etc), control pf the vegetative system (feeding and water intake, termorregulation), emotional reactions, memory…
HORMONAL CONTROL HYPOTHALAMUS
-… nucleus and … nucleus directly produce ADH
- … (several) nucleus induce factors that make veins release hormones.
- supraoptic, paraventricular
- medial preoptic nucleus, suprachiasmatic nucleus, arcuate nucleus, paraventricular nucleus
Name a part of the hypothalamus involved in sleep (CIRCADIAN RYTHMS)
SUPRACHIASMATIC NUCLEUS
Pupillary dilation is controlled by the … system
Sympathetic
Sweating is controlled by the … system
Sympathetic
Inhibition of gastrointestinal motility, Urine retention and ejaculation is controlled by the … system
Sympathetic
Stimulation of respirarory motility and stimulation of gastrointestinal motility is controlled by the … system
Parasympathetic
Contraction of bladder detrusor and erection are controlled by the … system
Parasympathetic
GABA (which induces sleep) is produced in the…
Anterior HP (preoptic)
Histamine is produced in the …
Posterior HT (tuberal-lateral area)
Orexins (sleep) are produced in the….
Lateral area HT (isolated)
Feeding is controlled by the … part of the HT, which is related to saciety
VENTROMEDIAL
A person who is constantly hungry might have a lesion in the … part of the HT
ventromedial
Feeding is controlled by the … part of the HT, which is related to hunger
LATERAL
Supraoptic and paraventricular parts of the HT produce… hormone
ADH
Emotional reactions are controlled by the … part of the HT
Dorsomedial
Thermoregulation is controlled by the… part of the HT
Anterior and posterior
Memory is controlled by the … of the HT
Mamillary
The … part of the HT controls the sympathetic autonomic regulation
Caudo-lateral
The … part of the HT controls the parasympathetic autonomic regulation
Rostro-medial
Tumour in the hypothalamus