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  2. Parietal lobe - Wikipedia

    en.wikipedia.org/wiki/Parietal_lobe

    Animation. Parietal lobe (red) of left cerebral hemisphere. The parietal lobe is defined by three anatomical boundaries: The central sulcus separates the parietal lobe from the frontal lobe; the parieto-occipital sulcus separates the parietal and occipital lobes; the lateral sulcus (sylvian fissure) is the most lateral boundary, separating it from the temporal lobe; and the longitudinal ...

  3. Precentral gyrus - Wikipedia

    en.wikipedia.org/wiki/Precentral_gyrus

    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 ...

  4. Cerebral cortex - Wikipedia

    en.wikipedia.org/wiki/Cerebral_cortex

    The cerebral cortex is the outer covering of the surfaces of the cerebral hemispheres and is folded into peaks called gyri, and grooves called sulci. In the human brain, it is between 2 and 3-4 mm. thick, [8] and makes up 40% of the brain's mass. [2] 90% of the cerebral cortex is the six-layered neocortex whilst the other 10% made up of three ...

  5. Inferior frontal gyrus - Wikipedia

    en.wikipedia.org/wiki/Inferior_frontal_gyrus

    The inferior frontal gyrus (IFG), (gyrus frontalis inferior), is the lowest positioned gyrus of the frontal gyri, of the frontal lobe, and is part of the prefrontal cortex. Its superior border is the inferior frontal sulcus (which divides it from the middle frontal gyrus), its inferior border is the lateral sulcus (which divides it from the ...

  6. 10–20 system (EEG) - Wikipedia

    en.wikipedia.org/wiki/10–20_system_(EEG)

    10–20 system (EEG) The 10–20 system or International 10–20 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research. This method was developed to maintain standardized testing methods ensuring that a subject's ...

  7. Posterior parietal cortex - Wikipedia

    en.wikipedia.org/wiki/Posterior_parietal_cortex

    The posterior parietal cortex receives input from the three sensory systems that play roles in the localization of the body and external objects in space: the visual system, the auditory system, and the somatosensory system. In turn, much of the output of the posterior parietal cortex goes to areas of frontal motor cortex: the dorsolateral ...

  8. Primary motor cortex - Wikipedia

    en.wikipedia.org/wiki/Primary_motor_cortex

    The primary motor cortex (Brodmann area 4) is a brain region that in humans is located in the dorsal portion of the frontal lobe. It is the primary region of the motor system and works in association with other motor areas including premotor cortex, the supplementary motor area, posterior parietal cortex, and several subcortical brain regions ...

  9. Parietal bone - Wikipedia

    en.wikipedia.org/wiki/Parietal_bone

    The parietal bones (/ pəˈraɪ.ɪtəl / pə-RY-it-əl) are two bones in the skull which, when joined at a fibrous joint known as a cranial suture, form the sides and roof of the neurocranium. In humans, each bone is roughly quadrilateral in form, and has two surfaces, four borders, and four angles. It is named from the Latin paries (-ietis), wall.

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