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Paracentral Sulcus
The paracentral sulcus is a sulcus of the brain. It forms the paracentral lobule's anterior border. It is part of the cingulate sulcus. Gallery File:Gray727 cingulate sulcus.svg, Medial surface of left cerebral hemisphere. (Cingulate sulcus The cingulate sulcus is a sulcus (brain fold) on the cingulate cortex in the medial wall of the cerebral cortex. The frontal and parietal lobes are separated from the cingulate gyrus by the cingulate sulcus. It terminates as the marginal sulcus o ... shaded in red.) References External links * https://web.archive.org/web/20090505144011/http://anatomy.med.umich.edu/atlas/n1a2p12.html Cerebrum Sulci (neuroanatomy) {{neuroanatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulcus (neuroanatomy)
In neuroanatomy, a sulcus (Latin: "furrow", pl. ''sulci'') is a depression or groove in the cerebral cortex. It surrounds a gyrus (pl. gyri), creating the characteristic folded appearance of the brain in humans and other mammals. The larger sulci are usually called fissures. Structure Sulci, the grooves, and gyri, the folds or ridges, make up the folded surface of the cerebral cortex. Larger or deeper sulci are termed fissures, and in many cases the two terms are interchangeable. The folded cortex creates a larger surface area for the brain in humans and other mammals. When looking at the human brain, two-thirds of the surface are hidden in the grooves. The sulci and fissures are both grooves in the cortex, but they are differentiated by size. A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure. Importance of expanded surface area As the surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brain
A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body. In a human, the cerebral cortex contains approximately 14–16 billion neurons, and the estimated number of neurons in the cerebellum is 55–70 billion. Each neuron is connected by synapses to several thousand other neurons. These neurons typically communicate with one another by means of long fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells. Physiologically, brains exert centralized control over a body's other organs. They act on the rest of the body both by generating patterns of muscle activity and by driving the secretion of chemicals called hormones. This centralized control allows rapid and coordinated respon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paracentral Lobule
In neuroanatomy, the paracentral lobule is on the medial surface of the cerebral hemisphere and is the continuation of the precentral and postcentral gyri. The paracentral lobule controls motor and sensory innervations of the contralateral lower extremity. It is also responsible for control of defecation and urination. It includes portions of the frontal and parietal lobes: * The anterior portion of the paracentral lobule is part of the frontal lobe and contains a little portion of Brodmann's area 6 (SMA): this is because the paracentral sulcus (branch of the limbic sulcus) does not correspond to the precentral sulcus on the medial plane. * The posterior portion is considered part of the parietal lobe and deals with somatosensory of the distal limbs. While the boundary between the lobes, the central sulcus, is easy to locate on the lateral surface of the cerebral hemispheres, this boundary is often discerned in a cytoarchetectonic manner in cases where the central sulcus i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cingulate Sulcus
The cingulate sulcus is a sulcus (brain fold) on the cingulate cortex in the medial wall of the cerebral cortex. The frontal and parietal lobes are separated from the cingulate gyrus by the cingulate sulcus. It terminates as the marginal sulcus of the cingulate sulcus. It sends a ramus to separate the paracentral lobule from the frontal gyri, the paracentral sulcus. Additional images File:Cingulate sulcus animation small.gif, Position of cingulate sulcus (shown in red). File:LobesCaptsMedial1.png, Medial surface of right cerebral hemisphere. Cingulate sulcus (labeled as sulcus cinguli) and brain lobes. File:Slide2ZEN.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. File:Slide3ZEN.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. File:Slide4ZE.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. External links * NIF Search - Cingulate Sulcusvia the Neuroscience Information Framework The Neuroscience Information ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cingulate Sulcus
The cingulate sulcus is a sulcus (brain fold) on the cingulate cortex in the medial wall of the cerebral cortex. The frontal and parietal lobes are separated from the cingulate gyrus by the cingulate sulcus. It terminates as the marginal sulcus of the cingulate sulcus. It sends a ramus to separate the paracentral lobule from the frontal gyri, the paracentral sulcus. Additional images File:Cingulate sulcus animation small.gif, Position of cingulate sulcus (shown in red). File:LobesCaptsMedial1.png, Medial surface of right cerebral hemisphere. Cingulate sulcus (labeled as sulcus cinguli) and brain lobes. File:Slide2ZEN.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. File:Slide3ZEN.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. File:Slide4ZE.JPG, Medial surface of cerebral hemisphere.Medial view.Deep dissection. External links * NIF Search - Cingulate Sulcusvia the Neuroscience Information Framework The Neuroscience Information ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerebrum
The cerebrum, telencephalon or endbrain is the largest part of the brain containing the cerebral cortex (of the two cerebral hemispheres), as well as several subcortical structures, including the hippocampus, basal ganglia, and olfactory bulb. In the human brain, the cerebrum is the uppermost region of the central nervous system. The cerebrum prenatal development, develops prenatally from the forebrain (prosencephalon). In mammals, the Dorsum (biology), dorsal telencephalon, or Pallium (neuroanatomy), pallium, develops into the cerebral cortex, and the ventral telencephalon, or Pallium (neuroanatomy), subpallium, becomes the basal ganglia. The cerebrum is also divided into approximately symmetric Lateralization of brain function, left and right cerebral hemispheres. With the assistance of the cerebellum, the cerebrum controls all voluntary actions in the human body. Structure The cerebrum is the largest part of the brain. Depending upon the position of the animal it lies eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
