The functions of semispinalis capitis and splenius capitis muscles: An electromyographic study

Abstract

The functions of the normal semispinalis capitis and splenius capitis muscles of fifteen subjects were evaluated electromyographically with bipolar fine‐wire electrodes. The voltage‐output data were integrated and analyzed by computer and showed that the main function of semispinalis capitis is limited to extension of the head. However, splenius capitis both extends the head and rotates it to its own side.