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The precentral gyrus is specialised for sending signals down to the spinal cord for movement. [1] As they travel down through the cerebral white matter, the motor axons move closer together and form part of the posterior limb of the internal capsule. They continue down into the brainstem, where some of them, after crossing over to the ...
The human primary motor cortex is located on the anterior wall of the central sulcus. It also extends anteriorly out of the sulcus partly onto the precentral gyrus. Anteriorly, the primary motor cortex is bordered by a set of areas that lie on the precentral gyrus and that are generally considered to compose the lateral premotor cortex.
The motor cortex is the region of the cerebral cortex involved in the planning, control, and execution of voluntary movements. The motor cortex is an area of the frontal lobe located in the posterior precentral gyrus immediately anterior to the central sulcus. Motor cortex controls different muscle groups.
Gray's Fig. 727 – Medial surface of left cerebral hemisphere. In neuroanatomy, a gyrus ( pl.: gyri) is a ridge on the cerebral cortex. It is generally surrounded by one or more sulci (depressions or furrows; sg.: sulcus ). [1] Gyri and sulci create the folded appearance of the brain in humans and other mammals .
Cortical homunculus. A cortical homunculus (from Latin homunculus 'little man, miniature human' [1] [2]) is a distorted representation of the human body, based on a neurological "map" of the areas and proportions of the human brain dedicated to processing motor functions, and/ or sensory functions, for different parts of the body.
Upper motor neuron. Upper motor neurons ( UMNs) is a term introduced by William Gowers in 1886. They are found in the cerebral cortex and brainstem and carry information down to activate interneurons and lower motor neurons, which in turn directly signal muscles to contract or relax. UMNs represent the major origin point for voluntary somatic ...
Brodmann area 6 ( BA6) is part of the frontal cortex in the human brain. Situated just anterior to the primary motor cortex ( BA4 ), it is composed of the premotor cortex and, medially, the supplementary motor area (SMA). This large area of the frontal cortex is believed to play a role in planning complex, coordinated movements.
Sensorimotor network. The sensorimotor network ( SMN ), also known as somatomotor network, is a large-scale brain network that primarily includes somatosensory ( postcentral gyrus) and motor ( precentral gyrus) regions and extends to the supplementary motor areas (SMA). [1] The auditory cortex may also be included. [2]