Cerebral Dominance

Question 1

The hemisphere responsible for logical, analytic & verbal tasks is called……, while that resp for musical & artistic talents is called……

Answer 1

Categorical
Representational

Question 2

Lesion of representational hemisphere leads to……

Answer 2

Agnosia & contralateral neglect

Question 3

Mention functions of parieto-occipito-temporal association areas

Answer 3

1. Analysis of spatial coordinates of the body (amorphosynthesis)
2. Area for language comprehension (Wernicke)
3. Area for interpretation of visual language reading, angular gyrus
4. Area for naming objects between temporal & occipital lobes

Question 4

Mention functions of prefrontal association area

Answer 4

Planning voluntary activity, creativity, decision making, personality traits, elaboration of thoughts, organize events in time, solving complex problems, site of operation of working memory, plans motor patterns of speech (Brocca’s), shares in control of emotional behaviour.

Question 5

Describe lesion of prefrontal cortex

Answer 5

Lack of initiation & self control, inability to solve complex problems, or to strong sequential tasks or to do parallel tasks, difficulty in attention, loack of temoral order & recent memory. Disorder in personality & social behaviour, person becomes impulsive & aggressive.

Question 6

Functions of Wernicke’s area

Answer 6

1. Comprehension of thoughts of visual & auditory information
2. Determination of thoughts to be expressed
3. Choice of proper words to be used

Question 7

Describe S&F of Broca’s area

Answer 7

S, frontal lobe in lower part of premotor area
F, formation of words, stores programs of the spoken words=sequence of coordinated contractions of lips, tongue & laryngeal muscles. Send this via speech articulation area in insula to motor cortex then to corticobulbar tract which initiates contractions

Question 8

Describe S&F of Exner’s area

Answer 8

S, upper part of premotor area
F, stores programs of written words=sequence of coordinated contractions of harnd muscles operates via corticospinal tract

Question 9

Mention types of sensory aphasia

Answer 9

Visual, auditory, Wernicke’s

Question 10

GR: Occurrence of conductive aphasia

Answer 10

Due to lesion of arcuate fasciculus but now appears to be due to lesions near auditory cortex.

Question 11

Picture of anomic aphasia & lesion

Answer 11

Patient can’t name seen objects, has difficulty to understand written words and pictures
Angular gyrus damage thus visual info is not processed & transmitted to Wernicke’s area

Question 12

Agraphia occurs with…..lesion

Answer 12

Exner’s area of hand skills

Question 13

Enumerate types of dysarthria

Answer 13

1. Spastic (UMNL)
2. Flaccid (LMNL)
3. Ataxic (neocerebellar lesion)
4. Hypokinetic (Parkinson)
5. Hyperkinetic (Basal ganglia lesion)
6. Mixed