Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

neuro exam 3 > hypothalmus > Flashcards

hypothalmus Flashcards

1
Q

what is the hypothalus involoved in

A

The hypothalamus is involved in those functions that require the integration of somatic, autonomic and endocrine mechanisms with motivated behavioral
expression.
Feeding
fight
flight
reproduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the hypothalmius autonomiccaly linked to

A

◼ reticular formation (especially autonomic
centers)
◼ limbic system ( memory/emotion)
◼ pituitary gland ( endocrine system)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what are the boundaries of the hypothalmus

A

◼ Caudal: mammillary body
◼ dorsal/superior: hypothalamic sulcus
◼ Rostral: lamina terminalis
◼ Inferior: optic chiasm, pituitary stalk
◼ Lateral: internal capsule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the divisions of the hypothalmus

A

◼ Supraoptic (anterior) hypothalamus ( optic chiasm)
◼ Tuberal (middle) hypothalamus
◼ Mammillary (posterior)
hypothalamus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are the hypothalmic efferents

A

◼ Medial forebrain bundle (MFB)
◼ Dorsal longitudinal fasciculus (DLF)
◼ Hypothalamo-hypophyseal tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

middle forebrain bundle
- what does it project to

A
  • disorgaized bundle not a typical tract
  • goes to the reticular formation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

dorsal longitudinal fasciculus (DLF)
What nervous system does it control

A
  • hypothalmus to the dorsal nucleus to the vagus
  • controls PNS
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

hypathalmo-hypohyseal tract

A
  • synthesize proteins/hormones that are realeased into blood vessesls
  • connection to the pituitary
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
A

from other nuclei in the hypothalmus - nuerosecretory neurons that end on bloodvessles/ secrete a hormine into them which then goes to the anterior pituitary to stimulate its homrones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

afferents to the hypothalmus

A

◼ Reticular formation (via MFB)
◼ Limbic pathways
◼ Fornix
◼Amygdalar pathways
◼ Monoaminergic pathways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

functions of the anteriro hypothalamus

A

◼ Thermoregulation
◼ Water balance
◼ Circadian rhythms
◼ Maternal behavior
◼ Sleep

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Anterior hypothalamus : thermo regulation
- responses

A

◼ Somatic (shivering)
◼ Autonomic (sweating, vasomotion)
◼ Behavior ( turning on heat and air conditioner)
- thermoreceptive neurons ( screen blood temp)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

mechanism of fever

A

normal > 98.6
fever >103
- not a loss of function but a setpoint that is raised to a higher temp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are sweat glands innervatred by

A

cholinergic sympathetics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

mechanism of fever
- how do NSAIDS affect this

A
  • antipiretic drugs and NSAIDS they nock out COX and reduce body temp
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

water balance
- what happens when you lose water when its hot

A
  • endocrine relesases ADH ( vasopressin)
  • tells kidney to conserve water
  • causes you to become thirsty and drink water
17
Q

what nucleus is circadian rythm generated by
- what does it recieve and from where
- what happens if there are leasions to the SCM

A

◼ Generated by suprachiasmatic
nucleus (SCN)
◼ SCN receives collaterals from optic
tract (retino-hypothalamic fibers)
◼ Lesions of SCN disrupt 24-hour
temperature, sleep, and endocrine
cycles

18
Q

where is the superchiasmatic nucleus

A
  • above the optic chiasm
19
Q

functions of the tuberal hypothalmus

A

◼ Control of plasma hormone levels
◼ Feeding behavior
◼ Sexual behavior
◼ Aggressive behavior

20
Q

what are feedinf behaviors based on and what happens if there are lesions to these

A

◼ Concept of feeding center (LH) and
satiety center (VMH)
◼ Lesions of LH ( lateral hypothalmuc) induce anorexia
◼ Lesions of VMH (ventral medial hyopthalmus) induce obesity

21
Q

what are the important nuclei of feeding behavior

A

◼ Arcuate nucleus
◼ Paraventricular nucleus

22
Q

sensing metabolic state: feeding hormones

A

◼ Ghrelin- appetite promoting (GI tract)
◼ Insulin (pancreas)
◼ Leptin (adipose tissue)

23
Q

what is feeding behavior conrolled by

A

◼ Behavior
◼ Autonomic (salivary secretion,
gastric secretion)
◼ Metabolic need

24
Q

what is attack behavior evoked by

A

◼ Attack behavior evoked by
stimulation of lateral hypothalamus

25
Q

what us defensive behvaior ekoked by

A

Defense behavior evoked by
stimulation of ventral medial
hypothalamus

26
Q

what is flight behvior ekoked by

A

◼ Flight behavior evoked by
stimulation of dorsal hypothalamus

27
Q

sexual behavior

A

◼ VMN has estrogen receptors
◼ VMN important in female sexual
behavior
◼ Sexually dimorphic nucleus in POA

28
Q

Hypothalamic lesion
what are the signs and symptoms of the this hypothalmic lesions: anteriro pituitary dysfunction

A
  • Gonadal dysfunction
  • Thyroid
  • Cortisol
  • Growth hormone
29
Q

symptoms of posterior pituitary dysfunction

A
  • Diabetes insipidus
30
Q

symptoms of hypthalmic dysfunction

A
  • Polyphagia or starvation
  • Impaired temperature regulation
  • Impaired autonomic function
31
Q

symptoms of horners syndrome

A

miosis
ptosis
anydrosis

neuro exam 3 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions