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Middle temporal gyrus is a gyrus in the brain on the temporal lobe. It is located between the superior temporal gyrus and inferior temporal gyrus. It corresponds largely to Brodmann area 21.
| Middle temporal gyrus | |
|---|---|
Lateral surface of left cerebral hemisphere, viewed from the side. (Middle temporal gyrus shown in orange.) | |
Right temporal lobe (shown in green). Middle temporal gyrus is visible at the middle of the green area. | |
| Details | |
| Part of | Temporal lobe |
| Artery | Middle cerebral and posterior cerebral |
| Identifiers | |
| Latin | gyrus temporalis medius |
| NeuroNames | 137 |
| NeuroLex ID | birnlex_1653 |
| TA98 | A14.1.09.146 |
| TA2 | 5495 |
| FMA | 61906 |
| Anatomical terms of neuroanatomy | |
The middle temporal gyrus is bounded by:
- the superior temporal sulcus above;
- the inferior temporal sulcus below;
- an imaginary line drawn from the preoccipital notch to the lateral sulcus posteriorly.
It has been connected with processes as different as contemplating distance, recognition of known faces, audio-visual emotional recognition,[1] and accessing word meaning while reading.[2] Some studies indicate that lesions of the posterior region of the middle temporal gyrus, in the left cerebral hemisphere, may result in alexia and agraphia for kanji characters (characters of Chinese origin used in Japanese writing).[3] The left middle temporal gyrus is also activated during poem composition.[4]
Additional images
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Position of middle temporal gyrus(shown in red).
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Drawing to illustrate the relations of the brain to the skull.
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Lateral view of a human brain, main gyri labeled.
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Cerebrum. Lateral view. Deep dissection. Superior temporal gyrus is labeled at bottom center.
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Middle temporal gyrus, right hemisphere.
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Middle temporal gyrus highlighted in green on coronal T1 MRI images
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Middle temporal gyrus highlighted in green on sagittal T1 MRI images
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Middle temporal gyrus highlighted in green on transversal T1 MRI images
References
edit- ^ Pourtois, G; Degelder, B; Bol, A; Crommelinck, M (2005). "Perception of Facial Expressions and Voices and of their Combination in the Human Brain". Cortex. 41 (1): 49–59. doi:10.1016/S0010-9452(08)70177-1. PMID 15633706. S2CID 3765984.
- ^ Acheson, DJ.; Hagoort, P. (Oct 2013). "Stimulating the brain's language network: syntactic ambiguity resolution after TMS to the inferior frontal gyrus and middle temporal gyrus" (PDF). J Cogn Neurosci. 25 (10): 1664–77. doi:10.1162/jocn_a_00430. hdl:2066/116682. PMID 23767923. S2CID 3513464.
- ^ Sakurai, Y.; Mimura, I.; Mannen, T. (2008). "Agraphia for kanji resulting from a left posterior middle temporal gyrus lesion". Behav Neurol. 19 (3): 93–106. doi:10.1155/2008/393912. PMC 5452449. PMID 18641429.
- ^ Liu, Siyuan; Erkkinen, Michael G.; Healey, Meghan L.; Xu, Yisheng; Swett, Katherine E.; Chow, Ho Ming; Braun, Allen R. (2015-05-26). "Brain activity and connectivity during poetry composition: Toward a multidimensional model of the creative process". Human Brain Mapping. 36 (9): 3351–3372. doi:10.1002/hbm.22849. ISSN 1065-9471. PMC 4581594. PMID 26015271.
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