WordNet

cross or intersect so as to form a cross; "this nerve decussates the other"; "the fibers decussate"
crossed or intersected in the form of an X (同)intersectant, intersecting
work as an intern; "The young doctor is interning at the Medical Center this year"
an advanced student or graduate in medicine gaining supervised practical experience (`houseman is a British term) (同)interne, houseman, medical intern
deprive of freedom; "During WW II, Japanese were interned in camps in the West"
happening or arising or located within some limits or especially surface; "internal organs"; "internal mechanism of a toy"; "internal party maneuvering"
occurring within an institution or community; "intragroup squabbling within the corporation" (同)intragroup
a slender and greatly elongated substance capable of being spun into yarn (同)fibre
a leatherlike material made by compressing layers of paper or cloth (同)fibre, vulcanized fiber
any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber) (同)fibre

PrepTutorEJDIC

(特に戦時中)〈人・船など〉‘を'強制収容する,抑留する
『内側の』,内部にある / 『国内の』(domestic) / 内からとる,内用の
弓形の,アーチ状の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/09/01 10:53:57」(JST)

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Internal arcuate fibers are the axons of second-order neurons contained within the gracile and cuneate nuclei of the medulla oblongata.

These fibers cross (decussate) from one side of the medulla to the other to form the medial lemniscus.

Part of the posterior column-medial lemniscus system (second neuron), the internal arcuate fibers are important for relaying the sensation of fine touch and proprioception to the thalamus and ultimately to the cerebral cortex.

External links

Hier-792 at NeuroNames
Photo at Indiana.edu

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English Journal

Potential of diffusion tensor MR imaging in the assessment of cognitive impairments in children with periventricular leukomalacia born preterm.

Wang S, Fan G, Xu K, Wang C.SourceDepartment of Radiology, The First Hospital, China Medical University, #155, Nanjing North St., Heping Dist., Shenyang, Liaoning 110001, China. Electronic address: jelly_66@126.com.
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Swelling of the arcuate nerve fiber layer after internal limiting membrane peeling.

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Endogenously determined restriction of food intake overcomes excitation-contraction uncoupling in JP45KO mice with aging.

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Japanese Journal

Diffusion Spectrum Imaging of Connective Structures in Normal and Disease Brain(International Forum on Medical Imaging in Asia 2009 (IFMIA 2009))

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Sensory Ataxic Dominant Neuropathy Associated with Polyarteritis Nodosa

Internal
NAID 10006996822

「decussate」

Internal arcuate fibers
	Diagram showing the course of the arcuate fibers. (Testut.) 1. Medulla oblongata anterior surface. 2. Anterior median fissure. 3. Fourth ventricle. 4. Inferior olivary nucleus, with the accessory olivary nuclei. 5. Gracile nucleus. 6. Cuneate nucleus. 7. Trigeminal. 8. Inferior peduncles, seen from in front. 9. Posterior external arcuate fibers. 10. Anterior external arcuate fibers. 11. Internal arcuate fibers(no it's actually olivo-cerebellar tracts). 12. Peduncle of inferior olivary nucleus. 13. Nucleus arcuatus. 14. Vagus. 15. Hypoglossal.
	Section of the medulla oblongata at about the middle of the olive. (Arcuate fibers labeled at center right.)
Details
Latin	fibrae arcuatae internae
Identifiers
Gray's	p.782
Dorlands; /Elsevier	f_05/12361842
TA	A14.1.04.109
FMA	72629
	Anatomical terminology

Internal arcuate fibers
Identifiers
Gray's	p.782
NeuroLex ID	Internal arcuate fiber bundle
TA	A14.1.04.109
FMA	72629
	Anatomical terms of neuroanatomy

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More specifically, neurons of the gracile and cuneate nuclei send projections that decussate as the internal arcuate fibers and ascend as the medial lemniscus to synapse inthe ventroposterolateral nucleus of the thalamus.