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39 terms

Hypothalamus

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The Hypothalamus is small...how many ounces?
third
The Hypothalamus forms the floor and lateral walls of which ventricle?
hunger, thirst, sex
The Hypothalamus has vague control over basic drives such as...
physical aspects
The hypothalamus controls what aspects of emotional expression?
Autonomic, Endocrine
The Hypothalamus is in control of two major systems of the body, what are they?
Parasympathetic
This autonomic function increases digestive motility, decreases heart rate, and constricts the pupils
Sympathetic
This autonomic function increases heart rate and vasoconstriction, decreases digestive motility, and is responsible for pupil dilation, piloerection, and sweat gland secretions
neuron axon extensions
Direct Endocrine control into the posterior pituitary is via the __________
neurohormones
Indirect Endocrine control to release anterior pituitary hormones is via __________
Supraoptic, Paraventricular
The _________ and _________ nuclei send axons down through the infundibular stalk via the supraopticohypophyseal tract.
posterior pituitary
The supraopticohypophyseal tract terminates in the ________
oxytocin, antidiuretic hormone (ADH)
The Supraoptic and Paraventricular nuclei are both capable of releasing what two substances?
supraopticohypophyseal
The supraoptic and paraventricular nuclei send axons down through the infundibular stalk via the __________________ tract
oxytocin
Major actions includes uterine contractions, milk let down, and ejection.
Antidiuretic hormone (ADH)
Major action is water resorption (saves H2O)
Suprachiasmatic Nuclei (SCN)
Responsible for our circadial (daily) 24-25 hour rhythms such as temperature, sleep, light, feeding, etc. Complexly connected to the pineal gland.
Anterior Nucleus
Nucleus that is generally known for its parasympathetic functions
Preoptic area (nucleus)
A thermoregulator, especially as the body heats up; stimulates sweating
Dorsomedial nuclei
Has a parasympathetic influence on the GI tract; fairly diffuse nuclei
Ventromedial nuclei
A center for eating and thirst gratification ("satiety center")
Arcuate Nuclei
Near the infundibular stalk of the intermediate area, contributes axons to the tuberoinfundibular tract.
Tuberoinfundibular
The Arcuate nuclei contributes axons to the ___________ tract.
anterior pituitary, releasing factors
The tuberoinfundibular tract secreates neurohormones that pass to the __________ by the way of the bloodstream and release pituitary hormones called ___________
Hypothalamic Hypophysiotropic Hormones
Another name for the "releasing factors"
Tuber cinereum
The undulating bulge between the infundibular stalk and the mammillary bodies.
Mammillary bodies
A nucleus important for short term memory.
Korsakov's syndrome
The loss of short-term memory from alcohol...associated with the mammillary bodies.
Anterograde
Amnesia where you don't remember anything after the incident.
Retrograde
Amnesia where you don't remember anything before the incident.
Confabulation
Invented memories to fill in the gaps
Posterior nuclei
A thermoregulator; especially as the body cools down...stimulating shivering (piloerection)
Hypothalamohypophyseal tracts
Tracts that includes the Supraopticohypophyseal tract and tuberoinfundibular tract...
Rathke's Pouch
Which area gives rise to the anterior pituitary (adenohypophysis) and intermediate pituitary?
bloodstream
The anterior pituitary must receive its hypothalamic influence via the _________
internal carotid arteries
Most blood to the pituitary and its infundibular stalk comes from the branches off the ___________
fenestrated sinusoids
Within the infundibular stalk the small arteries break into highly permeable capillaries called ____________
sinusoids
The ________ pick up releasing factors from the tuberoinfundibular tract fibers.
hypophyseal portal veins
A series of small veins drain the hormone-laden blood to the capillary beds of the anterior pituitary...what are these veins called?
pituitary hormones
Once the releasing factors enter the substance of the anterior pituitary they exert a controlling influence on the release of __________