Identification muscle
As characteristic muscle in the will anatomy a muscle called, that of a spinal segment is innervated. The identification muscles have clinical relevance, as they can be used to narrow down the location of the damage. Due to the failure of the muscle, certain reflexes can no longer be triggered and some movements can no longer be performed.
Important identification muscles in the human body
| Nerve root | Identification muscle | reflex | function |
|---|---|---|---|
| C5 | M. deltoideus | Lateral lifting of the arm (abduction) | |
| (C5-) C6 | M. biceps brachii | Biceps tendon reflex | Flexion in the elbow |
| (C5-) C6 | M. brachioradialis | Brachioradialis reflex / supinator reflex | External rotation of the elbow (supination) |
| C7 | M. triceps brachii | Triceps tendon reflex | Stretching in the elbow (extension) |
| C7 | M. pronator teres | Pronator teres reflex | Twisting of the elbow (pronation) |
| C8 | Minor Finger Ball Muscles | ||
| C8 | Mm. interossei | ||
| (L3-) L4 | M. vastus medialis & M. vastus lateralis | Patellar tendon reflex | Extension of the leg |
| L5 | M. tibialis anterior | ||
| L5 | M. extensor hallucis longus | Tibialis Posterior Reflex (TPR) | Extension of the big toe |
| L5 | M. tibialis posterior | Tibialis Posterior Reflex (TPR) | Twisting of the foot (supination) |
| S1 (-S2) | M. triceps surae | Achilles tendon reflex | Lower foot (plantar flexion) |
Individual evidence
- ↑ a b c d e f g h i j k Martin Trepel. Neuroanatomy: structure and function. 6th edition 2015. Munich. Elsevier. P. 27.
- ↑ H.-J. Braune, G. Huffmann: M. tibialis anterior - identification muscle of the nerve root L4? In: Current Neurology . tape 18 , no. 01 , 1991, ISSN 0302-4350 , pp. 34–35 , doi : 10.1055 / s-2007-1018091 ( thieme-connect.de [accessed on March 5, 2019]).