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Definition of the noun decussation

What does decussation mean as a name of something?

noun - plural: decussations

  1. an intersection or crossing of two tracts in the form of the letter X

Alternative definition of the noun decussation


  1. A crossing or intersection of lines etc. so as to form an X-shape.


Decussation is used in biological contexts to describe a crossing. In anatomy the term chiasma or chiasm means much the same as decussation.

Printed dictionaries and other books with definitions for Decussation

Click on a title to look inside that book (if available):

Google previewComputing the Mind (2008)

How the Mind Really Works by Shimon Edelman

Decussation is a very common neuroanatomical trait found in different sensory modalities in many species.

Google previewNeuropsychology (2015)

From Theory to Practice by David Andrewes

Decussation is the crossing over of neural connections to allow contralateral control. Contralateral control over ipsilateral control of movement for simple unimanual response is well documented from a number of sources, although minor ...

Google previewThe Basal Ganglia VIII (2006)

by John Paul Bolam, Cali A. Ingham, Peter J. Magill

Although basal ganglia connectivity is largely sustained by ipsilateral projections, several decussations involving basal ganglia nuclei have already been described. The bestcharacterized decussation is the crossed nigrostriatal pathway (Fass ...

Google previewThe Functions of the Brain (1876)

by David Ferrier

In frogs, birds and the lower mammalia, the tracts decussate through each other; but anatomically and physiologically, it has been demonstrated that the decussation is a complete one. When one optic lobe is destroyed in a frog or bird, ...

Google previewPsychophysiology (2013)

Human Behavior & Physiological Response by John L. Andreassi

The decussation is a crossing over of fibers from the motor cortex of the right hemisphere to the left side of the body and from left hemisphere to the right side of the body. This organization of the voluntary motor system (pyramidal system) is ...

Google previewMRI Atlas of Human White Matter (2005)

by Susumu Mori, S. Wakana, Peter C M van Zijl, L.M. Nagae-Poetscher

The decussation is that of the corticospinal tract. Three-dimensional atlas of brain white matter ...

Google previewGreenfield's Neuropathology, 2-Volume Set, Eighth Edition (2008)

by Seth Love, David Louis, David W Ellison

ASYMMETRY OF CROSSING OF THE CORTICOSPINAL TRACTS Failure to decussate is rare, 1030but asymmetrical decussation is a not uncommon finding in neonates ( Figure 5.132).

Google previewA Dictionary of Psychology (2015)

by Andrew M. Colman

pyramidal decussation n. The partial *decussation of the *corticospinal tract in the medulla oblongata, just above its junction with the top of the spinal cord, where the fibres of *pyramidal ...

Google previewDictionary of Biological Psychology (2003)

by Philip Winn

As a noun—decussation—this means a crossing of FIBRES, more or less in the shape of an X; as a verb it means similarly to cross—as in 'the OPTIC CHIASM is where the OPTIC NERVE decussates'. It has a Latin root: a decussis was a coin ...

Google previewWiley-Blackwell Student Dictionary of Human Evolution (2015)

by Bernard Wood

decussation. Enamel prisms typically do not run in a straight line from the enamel –dentine junction to the surface of the tooth. Instead they twist in a wave-like manner two or three times before running straight to the surface in the outer ...

Google previewThe American Encyclopedia and Dictionary of Ophthalmology (1919)

by Casey Albert Wood

A curious question is whether or not the pupillary fibres undergo a second semi- decussation in the mid-brain. While the arguments advanced by Behr (vide infra) in favor of the view that they do so are not universally accepted thefact remains ...

Google previewEncyclopedia of Neuroscience (2009)

Volume One by Larry R. Squire

Figure 2 The pyramidal tract decussation and the role of L1-CAM in forming the contralateral descending CS projection. (a1) Image from a normal mouse showing the pyramidal decussation. Axons from the two sides are labeled red and green ...

Google previewA Dictionary of Neurological Signs (2010)

by A.J. Larner

Cross References Nystamgus; Saccades; Saccadic intrusion, Saccadic pursuit Pyramidal Decussation Syndrome Pyramidal decussation syndrome is a rare crossed hemiplegia syndrome, with weakness of one arm and the contralateral leg ...

Google previewEncyclopedia of the Eye (2010)

by Joseph Besharse, Reza Dana

ROBO3 mutations likely disturb brainstem morphogenesis by failing to promote decussation of long motor and sensory tracts in the pons and medulla.

Google previewA Pocket Medical Dictionary (1911)

Giving the Pronunciation and Definition of the Principal Words Used in Medicine and the Collateral Sciences ... by George Milbry Gould

DECUSSATION which encapsules the ovum. D. seroti'na, the area of the uterine wall to which the ovum is attached. D. ve/ra, the uterine mucosa. Deciduitis, de- sid-u-t'-tis. Inflammation of the decidual membrane of the gravid uterus.

Google previewThe American illustrated medical dictionary (1922)

by William Alexander Newman Dorland

DECUSSATION DEGENERATION decussation (de-kus-a'shun) [L. decussa'lio]. t. The running of two fellow-parts or structures athwart each other; a chiasm. 2. The point of crossing of decussate parts, fillet d., a crossing of nerve-fibers over the ...

Online dictionaries and encyclopedias with entries for Decussation

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Video about Decussation

Decussation Meaning

Video shows what decussation means. A crossing or intersection of lines etc. so as to form an X-shape.. Decussation Meaning. How to pronounce, definition ...

Scrabble value of D2E1C3U1S1S1A1T1I1O1N1

The value of this 11-letter word is 14 points, but it's not an accepted word in the Official Scrabble Players Dictionary.


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