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
dividing an animal into right and left halves (同)median
a bundle of sensory nerve fibers going to the thalamus (同)fillet

PrepTutorEJDIC

中間の,中間に位置する / 平均の,並なみの
mediumの複数形

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/12/23 18:28:35」(JST)

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The medial lemniscus, also known as Reil's band or Reil's ribbon, is a pathway in the brainstem that carries sensory information from the gracile and cuneate nuclei to the thalamus.

Path[edit]

After neurons carrying proprioceptive or touch information synapse at the gracile and cuneate nuclei, axons from secondary neurons decussate at the level of the medulla and travel up the brainstem as the medial lemniscus on the contralateral (opposite) side. It is part of the posterior column-medial lemniscus system, which transmits touch, vibration sense, as well as the pathway for proprioception.

The medial lemniscus carries axons from most of the body and synapses in the ventral posterolateral nucleus of the thalamus, at the level of the mamillary bodies. Sensory axons transmitting information from the head and neck via the trigeminal nerve synapse at the ventral posteromedial nucleus of the thalamus.

Location of the medial lemniscus through the brainstem[edit]

The cuneate and gracile nuclei reside at the closed (lower) medulla, so the lemniscus isn't formed at this level. Fibres from these nuclei will pass to the contralateral side of the brainstem, as the internal arcuate fibres.
At the open medulla (further up the brainstem), the medial lemniscus contains axons from the trigeminal nerve (which supplies the head region), as well as the arms and legs. It sits very close to the midline, at the same orientation of the midline, with head fibres more dorsal (closer to the back), towards the fourth ventricle.
By mid-pons, the medial lemniscus has rotated. Fibres from the head are medial, fibres from the leg are lateral.
The orientation in the midbrain is similar to that in the pons.

Additional images[edit]

Deep dissection of brain-stem. Lateral view.
Deep dissection of brain-stem. Ventral view.
Coronal section of the pons, at its upper part.
Transverse section of mid-brain at level of inferior colliculi.
Scheme showing the course of the fibers of the lemniscus; medial lemniscus in blue, lateral in red.
Horizontal section through the lower part of the pons. The medial lemniscus is labeled #17.

External links[edit]

Brainstem at UWisc 04NGNC
BrainMaps at UCDavis medial lemniscus

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English Journal

Anatomical location of the medial lemniscus and spinothalamic tract at the pons in the human brain: A diffusion tensor tractography study.

Jang SH, Kwon HG.SourceDepartment of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University , Namku, Taegu , Republic of Korea.
Somatosensory & motor research.Somatosens Mot Res.2013 Dec;30(4):206-9. doi: 10.3109/08990220.2013.796923. Epub 2013 Jun 5.
Abstract Using diffusion tensor tractography, we investigated the anatomical location of medial lemniscus (ML) and spinothalamic tract (STT) at pons. We recruited 47 healthy volunteers. Evaluation of the anatomical location of ML and STT was performed using the highest probabilistic location at the
PMID 23738628

Auditory signal processing in communication: Perception and performance of vocal sounds.

Prather JF.SourceProgram in Neuroscience, Department of Zoology and Physiology, University of Wyoming, 1000 E. University Avenue - Dept. 3166, Laramie, WY 82071, USA. Electronic address: Jonathan.Prather@uwyo.edu.
Hearing research.Hear Res.2013 Nov;305:144-55. doi: 10.1016/j.heares.2013.06.007. Epub 2013 Jul 1.
Learning and maintaining the sounds we use in vocal communication require accurate perception of the sounds we hear performed by others and feedback-dependent imitation of those sounds to produce our own vocalizations. Understanding how the central nervous system integrates auditory and vocal-motor
PMID 23827717

Conserved mechanisms of vocalization coding in mammalian and songbird auditory midbrain.

Woolley SM, Portfors CV.SourceColumbia University, Department of Psychology, 406 Schermerhorn Hall, 1190 Amsterdam Ave., New York, NY 10027, USA. Electronic address: sw2277@columbia.edu.
Hearing research.Hear Res.2013 Nov;305:45-56. doi: 10.1016/j.heares.2013.05.005. Epub 2013 May 31.
The ubiquity of social vocalizations among animals provides the opportunity to identify conserved mechanisms of auditory processing that subserve communication. Identifying auditory coding properties that are shared across vocal communicators will provide insight into how human auditory processing l
PMID 23726970

Japanese Journal

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山口りか,南里悠介,薬師寺祐介 [他]
臨床神経学 53(1), 46-49, 2013-01
NAID 40019555248

手掌・両側口症候群を呈した片側橋被蓋傍正中部出血の 1 例～手掌・両側性口症候群～

山口りか,南里悠介,薬師寺祐介,雪竹基弘,原英夫
臨床神経学 53(1), 46-49, 2013
症例は83歳男性である．突然の右手指・両側口周囲のしびれ感で発症．神経学的には上記異常感覚の他，右半身に軽度の温痛覚鈍麻をみとめた．頭部CT・MRI にて橋被蓋傍正中部左側寄りに微小出血をみとめた．翌日には右半身の温痛覚鈍麻は消失し，右手指と両側口周囲の異常感覚のみ残存，手掌・両側口症候群と診断した．本例では，左内側毛帯と左三叉神経毛帯腹側路の障害による右手と右口周囲の異常感覚に加えて，左口周囲の …
NAID 130004505303

Anatomical Details of the Brainstem and Cranial Nerves Visualized by High Resolution Readout-segmented Multi-shot Echo-planar Diffusion-weighted Images using Unidirectional MPG at 3T

NAGANAWA Shinji,YAMAZAKI Masahiro,KAWAI Hisashi,SONE Michihiko,NAKASHIMA Tsutomu,ISODA Haruo
Magnetic resonance in medical sciences : MRMS 10(4), 269-275, 2011-12-01
… DWI by rs-EPI was significantly better than DWI by single-shot EPI for visualizing the medial longitudinal fasciculus, lateral lemniscus, corticospinal tract, and seventh/eighth cranial nerves and offered significantly less distortion of the brainstem. …
NAID 10030284698

「内側毛帯」

Brain: Medial lemniscus
	; The sensory tract. (Medial lemniscus labeled at center right.)
	; Coronal section through mid-brain. ("e" is Portion of medial lemniscus, which runs to the lentiform nucleus and insula. "a’" is also the medial lemniscus.)
Latin	lemniscus medialis
Gray's	subject #188 803
NeuroNames	ancil-736
NeuroLex ID	birnlex_887

　　[★]

英: medial lemniscus (KH)
ラ: lemniscus medialis
同: 内側係蹄
関: 延髄、外側毛帯、上行性伝導路

延髄にある構造
後索-内側毛帯系(延髄視床路は延髄の薄束核や楔状束核から視床までの経路で後索-内側毛帯系の一部)が通る。
薄束核や楔状束核のニューロンは軸索を交差し(毛帯交差)、内側毛帯を経由して視床に至る。

延髄のレベル。正中部付近の前後方向を貫くように両側性に分布。

Henry Gray (1825-1861). Anatomy of the Human Body. 1918.

「decussate」

　　[★]

vi.

X字形に交わる

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.

「medial」

　　[★]

adj.

内側の、中心の、中央の、内側性の

関: center、central、centre、centro、centrum、hub、inner、inside、interior、medialis、medially、middle

「lemniscus」

　　[★]

n.

(Anatomy)a band of fibers, esp. of white nerve fibers in the brain.
毛帯

関: lemniscal

ex.

「media」

　　[★]

n.

関: culture、culture media、culture medium、culture solution、medium

リンク元	「内側毛帯」「decussate」
関連記事	「medial」「lemniscus」「media」

匿名

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案内

案内

medial lemniscus