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hypoglossal nerve

the 12th cranial nerve, a motor nerve that originates in a nucleus on the floor of the fourth ventricle within the brain and innervates the muscles of the tongue, lower jaw, and areas of the neck and chest. Also called cranial nerve XII.

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Psychology term of the day

December 20th 2024

expert testimony

expert testimony

evidence given in court by an expert witness. Unlike other testimony, this evidence may include the witness’s opinions about certain facts to help the trier of fact to make a decision. See opinion testimony; ultimate opinion testimony.