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Part II ISQ Club - Neuroanatomy

49 posts in this topic

20 Part II ISQs on two topics will be posted twice a week. You are encouraged to post a reply in the thread, stating whether you think an ISQ is true or false and why (eg. a short explanation, with reference to the textbook you used). Please only deal with one ISQ in each post and include the question as the first line of your post. All ISQs are taken from previous posts by Forum members.

In a few days this ISQ Club thread will be moved to the Question Bank board. If you submit an answer, your status will be changed to 'Question Bank member' and you will be able to see the Question Bank board. Please allow up to 48 hours for this change to happen.

1. The hippocampus is supplied by the anterior cerebral artery

2. The suprachiasmatic nucleus increases firing abruptly shortly before dawn

3. The dentate gyrus is part of the limbic system

4. The uncus is supplied by the anterior cerebral artery

5. The planum temporale is on the inferior surface of the temporal lobe

6. The dentate gyrus is a part of limbic system

7. Wernicke’s area is supplied by the anterior cerebral artery

8. Visuospatial problems are seen if the non-dominant parietal lobe is affected.

9. Cerebrospinal fluid is normally produced at a pressure of 60-150mm Hg

10. The alpha wave on an EEG is seen predominantly in the occipital lobe

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3. The dentate gyrus is part of the limbic system

TRUE

Dentate gyrus is part of hippocampal formation, which is part of limbic system

(Pg 98-100, Exam Notes in Psych, Basic sc, Malhi & Mitchell)

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7. Wernicke’s area is supplied by the anterior cerebral artery

FALSE

Wernicke’s area is in the temporal lobe which is supplied by the middle cerebral artery

(Pg 28, 96 & 116, Exam Notes in Psych, Basic sc, Malhi & Mitchell)

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10. The alpha wave on an EEG is seen predominantly in the occipital lobe

TRUE

(Pg 139, Exam Notes in Psych, Basic sc, Malhi & Mitchell)

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2. The suprachiasmatic nucleus increases firing abruptly shortly before dawn

Would guess true as it acts as a biological clock - ablation of this nucleus cause disruption of the sleep-wake cycle etc (Puri and Tyrer - Sciences)

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8. Visuospatial problems are seen if the non-dominant parietal lobe is affected

true

Features of the parietal lobe syndrome include visuospatial difficulties such as constructional apraxia (eg difficulties in buttoning ones coat) and visuospatial agnosia, topographical dosorientation, visual inattention, sensory jacksonian fits, and cortical sensory loss.

Non-dominant lesions, in particular, may cause anosognosia, hemisomatognosia, dressing apraxia, and prosopagnosia. (Puri and Tyrer, Sciences ..) :P

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5. The planum temporale is on the inferior surface of the temporal lobe

FALSE

“The planum temporale, located on the posterior and superior surface of the temporal lobe, is a brain region thought to be a biological substrate of language and possibly implicated in the pathophysiology of schizophrenia.”

Kwon et al.  Left planum temporale volume reduction in schizophrenia.

Arch Gen Psychiatry. 1999 Feb;56(2):142-8.

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6. The dentate gyrus is a part of limbic system

TRUE

Dentate gyrus is part of hippocampal formation, which is part of limbic system

(Pg 98-100, Exam Notes in Psych, Basic sc, Malhi & Mitchell)

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1)false

hippocampus supplied by the post cerebral artery(inferior & medal oart of temporal lobe)

pg 38 core psych

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9,csf is normally produced at a pressure of 60-150mmhg. answer is true 50-180mmhg

ref a-z of health through google search

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1. The hippocampus is supplied by the anterior cerebral artery

FALSE

Post cerebral artery

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2. The suprachiasmatic nucleus increases firing abruptly shortly before dawn

Ref Core Psychiatry Pg 537

The suprachiasmatic nucleus responds to light falling on the retina. So, I guess the answer must be false.

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The suprachiasmatic nucleus increases firing abruptly shortly before dawn.

True.

Individual suprachiasmatic nucleus neurons from adult mice maintained in culture for at least one week exhibited robust circadian rhythms in spontaneous activity that were similar in the free-running period (23.7+/-0.3 h mean+/-S.E.M.) to recordings from neurons dispersed from neonatal tissue, and showed evidence of entrainment to prior light cycles by exhibiting peak activity, in vitro, approximately 4.0+/-0.3 h (mean+/-S.E.M.) after the time of expected light onset.

- Aujard F, Herzog ED, Block GD

Neuroscience 2001;106(2):255-61.

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Posterior cerebral artery supplies hippocampus and uncus. So does choroidl artery ( branch of internal carotid)

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:(The Dentate gyrus is part of the limbic system- i think the answer is true. Ref Essential notes in basic sciences page 101

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5. The planum temporale is on the inferior surface of the temporal lobe

true

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6.the dentate gyrus is part of the limbic system-TRUE

generally,the papez circuit(limbic system) includes the parahippocampal formation which comprises:hippocampus,dentate gyrus & parahyppocampal gyrus(including the entorhinal cortex)

core psych 1ed(c2000)pgg24

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9.CSF is normally produced @ a pressure of 60-150mmhg-FALSE!!

normal opening pressure is 7-18cmCSF=70-180mmCSF.

PLS NOTE THE UNIT IS mmCSF,NOT mmhg!!

ref-OHCM5ed(c2001)pgg359.

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10. The alpha wave on an EEG is seen predominantly in the occipital lobe

TRUE

Alpha is a common state for the brain and occurs whenever a person is alert (it is a marker for alertness and sleep), but not actively processing information. They are strongest over the occipital (back of the head) cortex and also over frontal cortex

google search. ::)

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