The telencephalon is the largest part of the human brain, accounting for approximately 85% of total brain weight. It consists of two cerebral hemispheres separated by a deep longitudinal fissure and contains regions specialized for sensory and motor functions. The outer layer, known as the cerebral cortex, is composed of layers of cells and features raised ridges called gyri separated by grooves called sulci. Beneath the cortex lies subcortical white matter and collections of grey matter structures including the basal ganglia and amygdala.1
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