Cortical Lobe Lesions

Question 1

Causes of frontal lobe lesion

Answer 1

Head injury (trauma)
Cerebrovascular event - occlusion of MCA, ACA
Space occupying lesion
Frontotemporal dementia

Question 2

Clinical features of frontal lobe lesions

Answer 2

Perseveration
Change of affect: apathetic/exuberant/uninhibited
Loss of abstract thought
Lack of spontaneous activity: unable to plan activities

Question 3

Causes of parietal lobe lesions

Answer 3

Cerebrovascular event - MCA

Question 4

Clinical features of parietal lobe lesion

Answer 4

Contralateral hemisensory loss
Contralateral homonymous lower quadrantanopia
Contralateral neglect syndrome: ignore halves of objects, ignore half of own body, despite normal visual field

Question 5

Causes of temporal lobe lesion

Answer 5

Cerebrovascular event - MCA
Space occupying lesion
Trauma - extradural haematoma
Epilepsy
Frontotemporal dementia
Herpes simplex encephalitis

Question 6

Clinical features of temporal lobe lesion

Answer 6

Disturbance in auditory perception
Disturbance in selective attention of auditory and visual input - short term memory loss
Disturbance in visual perception - prosopagnosia
Wernicke aphasia
Anterograde amnesia
Personality change
Contralateral homonymous superior quadrantanopia

Question 7

Causes of occipital lobe lesion

Answer 7

Cerebrovascular event - PCA, MCA

Epilepsy

Question 8

Presentation of occipital lobe lesion

Answer 8

Contralateral homonymous hemianopia with macular sparing