Chen Yu suffered a head injury after crashing his motorcycle. When he awoke from a two-day coma, he found that he could formulate his thoughts linguistically, but he lost the ability to speak. Chen Yu suffered damage to area in the left hemisphere.

Broca's area

Explanation:

Broca area is the region of the brain that contains neurons involved in speech functioning. It is located in the frontal part of the left hemisphere of the brain,

the broca's area is known and considered to be responsible for controlling the muscles of related movements of lips, tongue, larynx, and pharynx.

Damage to the frontal area can result to speech disorder known as broca aphasia, which can be characterized by deliberate, telegraphic speech with very simple grammatical structure, though the speaker may be quite clear as to what he or she wishes to say and may communicate successfully.

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