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physical and personality changes that may occur following a head injury. They may include amnesia, headache, dizziness, difficulty concentrating, restlessness, depression, irritability, sweating, heart palpitations, and insomnia.
Etymology: L, post + concussio, shake violently
a condition that follows head trauma, characterized by dizziness, poor concentration, headache, hypersensitivity, and anxiety. It usually resolves itself without treatment. Also called posttraumatic syndrome.