Neuro: Functional Areas

Question 1

Site of Motor Area 4

Answer 1

Precentral gyrus and anterior part of paracentral Lobule

Question 2

Function of motor Area 4

Answer 2

origin to 40% of pyramidal tract (corticospinal and corticonuclear) of opposite half of body

Question 3

Lesion to Motor Area 4

Answer 3

Contralateral Hemiplegia

Question 4

Motor area of lower part of lower limb and perineum

Answer 4

Anterior part of paracentral lobule, medial surface of cerebral hemisphere (motor Area 4)

Question 5

Motor area 4 is the pyramidal Area for All the body except

Answer 5

The eye

Question 6

Representation of the body in motor Area 4

Answer 6

Inverted upside down

Question 7

Site of Premotor Area (6)

Answer 7

In front of Motor Area 4

Question 8

Function of premotor Area (60

Answer 8

• 40% pyramidal tract
• Extrapyramidal tract
• Succesful performance of Acts (by storage of skilled movements learned by experience)
• Inhibition of muscle tone

Question 9

Lesion to premotor Area 6

Answer 9

• Motor Apraxia
• Instability of posture
• Spasticity of muscles (high muscle tone)

Question 10

Site of Frontal eye field Area (Area 8)

Answer 10

Posterior part of middle frontal Gyrus

Question 11

Function of Frontal Eye field Area (8)

Answer 11

• lateral Conjugate eye movement
• Accommodation reflex

Question 12

Lesion to Frontal Eye field Area (8)

Answer 12

• Loss of Lateral Conjugate eye movement
• Loss of Accommodation

Question 13

Site of Broca’s Area (Area 44)= Motor speach area

Answer 13

Posterior part of inferior frontal gyrus of dominant hemisphere (commonly left)

Question 14

Function of Broca’s Area (Area 44)

Answer 14

• Formation of speech by connections with primary motor Areas
• Coordinates movement of larynx, tongue and lips

Question 15

Lesion to Broca’s Area (Area 44) leads to

Answer 15

Motor Aphasia (patient unable to express his thoughs through speech)

Question 16

Site of Prefrontal Area (association Area)

Answer 16

remaining part of Lateral surface of frontal lobe

Question 17

Function of Prefrontal Area (association Area)

Answer 17

Personal Reactions (emotions and behaviour)

Question 18

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Medial Surface of frontal lobe is responsible for

Answer 18

Emotional behaviour

Question 19

Lesion to Prefrontal Area (association Area) causes

Answer 19

Personality Changes

Question 20

Orbital Surface of Frontal Lobe is responsible for

Answer 20

Control of Autonomic Activities

Question 21

Site of main sensory Area (3,1,2)

Answer 21

Postcentral gyrus and posterior part of paracentral Lobule

Question 22

Function of main sensory Area (3,1,2)

Answer 22

• Higher centers for general Somatic Sensation Of the opposite half of the body
• Gives 20% pyramidal tract

Question 23

Lesion to main sensory Area (3,1,2) leads to

Answer 23

Contralateral Hemi-anesthesia

Question 24

Site of Parietal Association Area

Answer 24

Remaining part of Parietal Lobe, behind postcentral Sulcus

Question 25

Function of Parietal Association Area

Answer 25

Area where Visual, auditory and Tactile Sensations associate and are given meaning to

Question 26

Lesion to Parietal Association Area leads to

Answer 26

Astereognosis

Question 27

Site of Supramarinal Area (Area 40)

Answer 27

Inferior Parietal Lobule

Question 27

Function of Supramarginal Area (40)

Answer 27

(2nd speech Area of Wernicke) Understands written and spoken language +Sending Speech to broca’s area

Question 28

Lesion to Supramarginal Area (40) leads to

Answer 28

• Inability to understand Written and spoken words (sensory Aphasia)

Question 29

Site of Angular Gyrus (Area 39)

Answer 29

Inferior Parietal Lobue

Question 30

Function of Angular Gyrus (Area 39)

Answer 30

Rest of Speech area of Wernicke (written language)

Question 31

Lesion to Angular Gyrus (Area 39) leads to

Answer 31

Alexia and Agraphia (inability to read and write)

Question 32

Site of Auditory sensory Area (41&42)

Answer 32

Middle of Superior Temporal gyrus

Question 33

Site of Auditory Association area (22)

Answer 33

Rest of superior Temporal Gyrus surrounding the Auditory sensory Area

Question 34

Function of Auditory Sensory Area (41,42)

Answer 34

Recieves Auditory Radiation from medial Geniculate body (for perception)

Question 35

Lesion to Auditory Sensory Area (41,42) leads to

Answer 35

Bilateral diminution of Hearing

Question 36

Function of Auditory Association Area (22)

Answer 36

Knowing meaning of heard sounds

Question 37

Lesion to Auditory Association Area (22) leads to

Answer 37

Auditory Agnosia

Question 38

Rest of temporal lobe seems to be concerned with

Answer 38

Memomry mechanism

Question 39

Site of Visual Sensory Area 17

Answer 39

At lips of postcalcarine sulcu (in both cuneus and ligual gyruses)

Question 40

Function of Visual Sensory Area 17

Answer 40

Recieves Radiation fibers from lateral geniculate body

Question 41

Lesion to Visual Sensory Area 17 leads to

Answer 41

ContralLateral hemianopia with macular sparing

Question 42

Site of Visual Association Area (18,19)

Answer 42

Surrounding Visual sensory area

Question 43

Function of Visual Association Area (18,19)

Answer 43

Meaning behind images and colour vision

Question 44

Lesion of Visual Association Area (18,19) leads to

Answer 44

Visual Agnosia and colour blindness