Signs Associated With Localized Lesions Of The Cortex (Table 2-13)

Question 1

Frontal lobe - primary motor cortex

Function, destructive lesion

Answer 1

Function: volitional movement

Lesion: CL paralysis and paresis (most pronounced in distal part of limbs and lower face)

Question 2

Frontal lobe- promotor area

Function, destructive lesion

Answer 2

Function: motor planning (praxis)

Lesion: apraxia or motor planning difficulties

Question 3

Frontal lobe- prefrontal area

Function, destructive lesion

Answer 3

Function: motor association area

Lesion: loss of specific motor plans

Question 4

Frontal- supplementary motor areas

Function, destructive lesion

Answer 4

Function: BL control of posture

Lesion: loss of BL control of posture

Question 5

Frontal- middle frontal gurus

Function, destructive lesion

Answer 5

Function: conjugate eye movement

Lesion: transitory paralysis of conjugate eye movements to opposite side

Question 6

Frontal- motor speech area (brocas)

Function, destructive lesion

Answer 6

Function: language production

Lesion: nonfluent aphasia

Question 7

Prefrontal area- dorsolateral

Function, destructive lesion

Answer 7

Function: motivation, problem solving

Lesion: BL lesions- umpires ability to concentrate

Question 8

Prefrontal area- orbitofrontal

Function, destructive lesion

Answer 8

Function: emotions, behavior

Lesion: unstable emotions, unpredictable behavior

Question 9

Prefrontal area- orbital Gyri (posterolateral)

Function, destructive lesion

Answer 9

Function: olfaction

Lesion: inability to discriminate odors