Yakovlevian torque (also known as occipital bending (OB)[1] or counterclockwise brain torque[2]) is the tendency of the right side of the human brain to be warped slightly forward relative to the left and the left side of the human brain to be warped slightly backward relative to the right. This is responsible for certain asymmetries, such as how the lateral sulcus of the human brain is often longer and less curved on the left side of the brain relative to the right. Stated in another way, Yakovlevian torque can be defined by the existence of right-frontal and left-occipital petalias, which are protrusions of the surface of one hemisphere relative to the other. It is named for Paul Ivan Yakovlev (1894–1983), a Russian-American neuroanatomist from Harvard Medical School.[3][4]
- ^ Maller, Jerome J.; Anderson, Rodney; Thomson, Richard H.; Rosenfeld, Jeffrey V.; Daskalakis, Zafiris J.; Fitzgerald, Paul B. (2015-01-30). "Occipital bending (Yakovlevian torque) in bipolar depression". Psychiatry Research: Neuroimaging. 231 (1): 8–14. doi:10.1016/j.pscychresns.2014.11.008. ISSN 0925-4927. PMID 25480522. S2CID 37224862.
- ^ Mock, Jeffrey; Zadina, Janet; Corey, David; Cohen, Jeremy; Lemen, Lisa; Foundas, Anne (2012). "Atypical Brain Torque in Boys With Developmental Stuttering". Developmental Neuropsychology. 37 (5): 434–452. doi:10.1080/87565641.2012.661816. PMC 5537737. PMID 22799762.
- ^ Toga, A.W.; Thompson, P.M. (2003). "Mapping brain asymmetry". Nat. Rev. Neurosci. 4 (1): 37–48. doi:10.1038/nrn1009. PMID 12511860. S2CID 15867592.
- ^ Carter, Rita, The Human Brain Book, p. 57, ISBN 978-0-7566-5441-2, Dorling Kindersley Limited, 2009