Spinal root T1 innervates primarily forearm and hand muscles. These are: Flexor digitorum superficialis, Flexor policis longus, Flexor digitorum profundus, Lumbricals, and Interossei. However, it also innervates Pectoralis major.


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C5 | C6 | C7 | C8 | T1 | T2 | Dermatomes | Help | Hand Kinesiology

Lorie Richards and Janice Loudon, University of Kansas Medical Center, School of Allied Health,
Occupational and Physical Therapy Education, October 1997