A lesion in the angular gyrus of the left parietal lobe is classically associated with which condition?

• A. Transcortical Sensory Aphasia
• B. Anomic Aphasia
• C. Wernicke's Aphasia
• D. Alexia Without Agraphia

Answer: (D)

Lesions in the left angular gyrus disrupt the integration of language with higher-level processing such as naming and reading, and they classically produce a constellation of deficits known as Gerstmann syndrome (including difficulties with calculating, finger recognition, left–right orientation, and writing). Because the angular gyrus supports word retrieval and naming, anomia is a common feature when this area is damaged. Among the options given, anomic aphasia best fits an angular gyrus lesion since the main issue is word-finding with relatively preserved comprehension and repetition. Wernicke’s aphasia arises from the posterior superior temporal gyrus, and transcortical sensory aphasia involves disconnection around the temporoparietal area with preserved repetition, while Alexia without Agraphia typically results from occipital/posterior callosal involvement affecting reading but sparing writing. Therefore, the angular gyrus lesion is most aligned with anomic aphasia.