https://wikimd.org/index.php?action=history&feed=atom&title=Myotome 2026-04-27T05:36:16Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wikimd.org/index.php?title=Myotome&diff=5808716&oldid=prev 2024-05-22T17:26:27Z

<p>CSV import</p> <p><b>New page</b></p><div>[[File:Gray64.png|thumb|Gray64.png]] {{Short description|Group of muscles innervated by the motor fibers of a single nerve root}}<br /> {{Infobox anatomy<br /> | name = Myotome<br /> | image = <br /> | caption = <br /> | width = <br /> | system = [[Muscular system]]<br /> | nerve = [[Spinal nerve]]<br /> | action = <br /> | Latin = <br /> | Greek = <br /> | TA98 = <br /> | TA2 = <br /> | FMA = 74994<br /> }}<br /> <br /> A &#039;&#039;&#039;myotome&#039;&#039;&#039; is a group of [[muscles]] that are innervated by the motor fibers of a single [[spinal nerve]] root. Myotomes are essential in the study of [[neuroanatomy]] and [[neurology]] as they help in understanding the distribution of motor function in the body.<br /> <br /> ==Development==<br /> During [[embryonic development]], myotomes originate from the [[somites]], which are segmented blocks of mesoderm located on either side of the [[neural tube]]. Each somite differentiates into three parts: the [[sclerotome]], which forms the [[vertebrae]] and [[ribs]]; the [[dermatome]], which forms the [[dermis]] of the skin; and the myotome, which forms the skeletal muscles.<br /> <br /> ==Clinical significance==<br /> Myotomes are clinically significant in diagnosing and understanding various [[neurological disorders]]. By testing the strength and function of specific muscle groups, healthcare providers can determine the level of spinal nerve root involvement. For example, weakness in the muscles innervated by the C5 nerve root may indicate a problem at the C5 level of the [[spinal cord]].<br /> <br /> ==Myotome chart==<br /> The following is a general chart of myotomes and their corresponding spinal nerve roots:<br /> <br /> * C1-C2: Neck flexion<br /> * C3: Neck lateral flexion<br /> * C4: Shoulder elevation<br /> * C5: Shoulder abduction<br /> * C6: Elbow flexion, wrist extension<br /> * C7: Elbow extension, wrist flexion<br /> * C8: Thumb extension, ulnar deviation<br /> * T1: Finger abduction<br /> * L2: Hip flexion<br /> * L3: Knee extension<br /> * L4: Ankle dorsiflexion<br /> * L5: Great toe extension<br /> * S1: Ankle plantarflexion<br /> * S2: Knee flexion<br /> <br /> ==Related concepts==<br /> * [[Dermatome (anatomy)]]<br /> * [[Spinal cord]]<br /> * [[Peripheral nervous system]]<br /> * [[Motor neuron]]<br /> * [[Reflex arc]]<br /> <br /> ==See also==<br /> * [[Somite]]<br /> * [[Sclerotome]]<br /> * [[Dermatome (embryology)]]<br /> * [[Neurology]]<br /> * [[Neuroanatomy]]<br /> <br /> ==References==<br /> {{Reflist}}<br /> <br /> [[Category:Muscular system]]<br /> [[Category:Neuroanatomy]]<br /> [[Category:Embryology]]<br /> [[Category:Spinal cord]]<br /> <br /> {{medicine-stub}}</div>

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