- 同
- 中心傍小葉
WordNet
- a small lobe or subdivision of a lobe
PrepTutorEJDIC
- 小葉;小裂片
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/06/29 00:20:45」(JST)
[Wiki en表示]
Paracentral lobule |
Medial surface of left cerebral hemisphere. (Paracentral lobule is shown in red.)
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Medial view of a halved human brain (Paracentral lobule labeled at top center, in blue.)
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Details |
Identifiers |
Latin |
lobulus paracentralis |
NeuroNames |
ancil-404 |
Dorlands
/Elsevier |
l_13/12500890 |
TA |
A14.1.09.209 |
FMA |
77534 |
Anatomical terms of neuroanatomy
[edit on Wikidata]
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Paracentral lobule is on the medial surface of the 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:[1]
- The anterior portion of the paracentral lobule is part of the frontal lobe and is often referred to as the supplementary motor area.
- 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 is not visible on the medial surface.
Contents
- 1 Function
- 2 Blood supply
- 3 Applied anatomy
- 4 Gallery
- 5 References
- 6 External links
Function
Neurons in paracentral lobule are concerned with:
- Motor and sensory innervations of the contralateral lower extremity
- Regulation of physiological function such as defecation and micturition
Blood supply
It is supplied by branches of the anterior cerebral artery.
Applied anatomy
Damage of paracentral lobule occurs from occlusion of anterior cerebral artery. Characteristic manifestations include:
- Contralateral lower limb muscle weakness
- Urinary incontinence
Gallery
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Animation. Paracentral lobule is shown in red.
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Medial view of a human right cerebral hemisphere. Paracentral lobule is labeled at top center, in green.
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Medial view of a human right cerebral hemisphere. Paracentral lobule is labeled at top center, in blue.
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Cingulate sulcus defines the boundaries of the paracentral lobule.
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Marginal sulcus. It defines the posterior boundary of the paracentral lobule.
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Paracentral sulcus. It defines the anterior boundary of the paracentral lobule.
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Central sulcus on the medial surface. It divides the paracentral lobule into the anterior part and the posterior part.
References
- ^ Neuroscience in medicine. Totowa, NJ: Humana Press. 2003. p. 348. ISBN 1-58829-016-6.
External links
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Wikimedia Commons has media related to Paracentral lobule. |
- http://psychology.uwo.ca/fmri4newbies/PrimeronCorticalSulci.html#Cingulate%20sulcus
Anatomy of the cerebral cortex of the human brain
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Frontal lobe |
Superolateral |
Prefrontal |
- Superior frontal gyrus
- Middle frontal gyrus
- Inferior frontal gyrus: 11
- 47-Pars orbitalis
- Broca's area
- 44-Pars opercularis
- 45-Pars triangularis
- Superior frontal sulcus
- Inferior frontal sulcus
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Precentral |
- Precentral gyrus
- Precentral sulcus
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Medial/inferior |
Prefrontal |
- Superior frontal gyrus
- Medial frontal gyrus
- Paraterminal gyrus/Paraolfactory area
- Straight gyrus
- Orbital gyri/Orbitofrontal cortex
- Ventromedial prefrontal cortex
- Subcallosal area
- Olfactory sulcus
- Orbital sulcus
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Precentral |
- Paracentral lobule
- Paracentral sulcus
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Both |
- Primary motor cortex
- Premotor cortex
- Supplementary motor area
- Supplementary eye field
- Frontal eye fields
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Parietal lobe |
Superolateral |
- Superior parietal lobule
- Inferior parietal lobule
- 40-Supramarginal gyrus
- 39-Angular gyrus
- Parietal operculum
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Medial/inferior |
- Paracentral lobule
- Precuneus
- Marginal sulcus
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Both |
- Postcentral gyrus/primary somatosensory cortex
- Secondary somatosensory cortex
- Posterior parietal cortex
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Occipital lobe |
Superolateral |
- Occipital pole of cerebrum
- Lateral occipital gyrus
- Lunate sulcus
- Transverse occipital sulcus
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Medial/inferior |
- Visual cortex
- Cuneus
- Lingual gyrus
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Temporal lobe |
Superolateral |
- Transverse temporal gyrus/Auditory cortex
- Superior temporal gyrus
- Middle temporal gyrus
- Superior temporal sulcus
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Medial/inferior |
- Fusiform gyrus
- Medial temporal lobe
- Inferior temporal gyrus
- Inferior temporal sulcus
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Interlobar
sulci/fissures |
Superolateral |
- Central (frontal+parietal)
- Lateral (frontal+parietal+temporal)
- Parieto-occipital
- Preoccipital notch
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Medial/inferior |
- Medial longitudinal
- Cingulate (frontal+cingulate)
- Collateral (temporal+occipital)
- Callosal sulcus
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Limbic lobe |
Parahippocampal gyrus |
- anterior
- Entorhinal cortex
- Perirhinal cortex
- Postrhinal cortex
- Posterior parahippocampal gyrus
- Prepyriform area
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Cingulate cortex/gyrus |
- Subgenual area
- Anterior cingulate
- Posterior cingulate
- Isthmus of cingulate gyrus: Retrosplenial cortex
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Hippocampal formation |
- Hippocampal sulcus
- Fimbria of hippocampus
- Dentate gyrus
- Rhinal sulcus
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Other |
- Supracallosal gyrus
- Uncus
- Amygdala
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Insular cortex |
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General |
- Operculum
- Poles of cerebral hemispheres
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Some categorizations are approximations, and some Brodmann areas span gyri.
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Related Links
- lobule [lob´ūl] a small segment or lobe, especially one of the smaller divisions making up a lobe. adj., adj lob´ular. l's of epididymis the wedge-shaped parts of the head of the epididymis, each comprising an efferent ductule of the testis. ...
- lobule [lob´ūl] a small segment or lobe, especially one of the smaller divisions making up a lobe. adj., adj lob´ular. l's of epididymis the wedge-shaped parts of the head of the epididymis, each comprising an efferent ductule of the testis. ...
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