11/10/2025
Dermatomes and Myotomes | Sensation | Anatomy Geeky Medics
Dermatomes - Physiopedia
DERMATOMES & MYOTOMES. DERMATOME | by TheraspOT | Medium
Dermatomes and Myotomes Flashcards | Quizlet
Dermatomes and Myotomes | Sensation | Anatomy Geeky Medics
Pulsenotes | Radiculopathies
A dermatome is an area of skin innervated by a single spinal nerve for sensory information, while a myotome is a group of muscles innervated by a single spinal nerve for motor control. They are the sensory and motor equivalents of each other, respectively, and are both crucial for clinical diagnosis when nerve damage is suspected.
Dermatome
Function: Sensation (e.g., touch, pain, temperature) in a specific area of the skin.
Origin: Derived from the dermis of the somites during embryonic development.
Clinical Significance: A pattern of skin sensation can help pinpoint a specific spinal nerve root that may be damaged. For example, pain or numbness in a dermatomal pattern can indicate a problem with that spinal nerve.
Myotome
Function: Muscle movement controlled by a single spinal nerve.
Origin: Derived from skeletal muscle tissue originating from the somites during embryonic development.
Clinical Significance: Testing the movement associated with a specific myotome can help diagnose nerve root compression or injury.
It's important to note that most muscles are innervated by more than one spinal nerve, so they contain parts of multiple myotomes.
Testing a specific myotome involves checking the strength of the muscles involved in that movement.
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