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Thought, Sense and Movement > Limbic System > Flashcards

Flashcards in Limbic System Deck (15):
1

Name the hypothalamic nuclei that have magnocellular neurones, where do these neurones project to?

Paraventricular and supraoptic nuclei
Project to the posterior pituitary gland

2

Which hypothalamic nuclei controls circadian rhythms?

Subchiasmatic

3

How are circadian rhythms regulated by the hypothalamus?

The subchiasmatic nuclei sends sympathetic nervous system projections (via the superior cervical ganglion) to the pineal gland which secretes the hormone melatonin

4

Name the two proteins that feed-forward and name the two proteins that are inhibitory completing a 24 hour cycle?

Positive feed-forward = Clock/BMAL
Negative feed-back = Period/Cry

5

What is the action of the lateral hypothalamic nuclei and what might a lesion in this area cause?

It induces feeding behaviour
Lesion will cause aphagia

6

What are the actions of the ventromedial hypothalamic nuclei and what might a lesion in this area cause?

Suppressed feeding behaviour (lesion = hyperphagia)
In women oestrogen acts on the VMN and increases sexual behaviour

7

What does the circumventricular area of the hypothalamus control?

Drinking behaviours as it is sensitive to blood constituents and therefore affected by ADH and oxytocin secreted by the posterior pituitary gland

8

What does the pre-optic area of the hypothalamus control?

In men testosterone acts on the pre-optic area and increases sexual behaviour

9

What stimulates the anterior pituitary?

CRH

10

What area of the hypothalamus controls the parasympathetic nervous system?

Anterior hypothalamus

11

What area of the hypothalamus controls the sympathetic nervous system?

Posterior hypothalamus

12

Damage to the amygdala can lead to which condition?

Kluver-Bucy syndrome

13

What are the symptoms of Kluver-Bucy syndrome?

Hyperphagia (classical symptom)
Fronto-temporal dementia
Hyper-sexuality
Visual agnosia
Loss of fear
Hyper-orality

14

Name the three nuclei of the amygdala?

Central
Basolateral
Corticomedial

15

What three things does the amygdala regulate?

Emotional learning and memory
Fear and conditioning
Reward