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Question 19M.3.SL.TZ1.c

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Date May 2019 Marks available [Maximum mark: 3] Reference code 19M.3.SL.TZ1.c
Level SL Paper 3 Time zone TZ1
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 3]
19M.3.SL.TZ1.c

The scan shows the brain of a patient affected by a stroke. The dark patch labelled X represents an area where cells have died.

[Source: Case courtesy of Dr Ahmed Abdrabou, Radiopaedia.org, rID: 36865]

Explain how studies of lesions have helped to identify the functions of different parts of the brain.

[3]

Markscheme

a. lesions are areas of brain injury ✔

b. diagnosed in living people using fMRI/CAT scan/PET scan ✔

c. autopsies reveal the position and extent of lesions/animal experimentation ✔

d. the behaviour/functioning of patient with lesion was observed ✔

Examiners report

Autopsies were more often mentioned than fMRIs. The link between position of a lesion and lost function was well understood.

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