Lesson 9: Rotator Cuff

(and first exercise graph)

by Brent Brookbush DPT, PT, MS, PES, CES, CSCS, ACSM H/FS

Lesson 9: Rotator Cuff Lecture

Study GuideRotator Cuff Quick Reference Study Guide

Note: If you intend to do the activities below do not open the "Study Guide" - all the answers are already filled in.  The study guide is just a quick reference tool, similar to flash cards - great for preparing for an exam.

Introduction:

In this lecture we will be discussing the "Rotator Cuff":

Etymology:

  • rotate (v.) 1794, intransitive, back-formation from rotation. Transitive sense from 1823. Related: Rotated; rotating. Rotator "muscle which allows a part to be moved circularly" is recorded from 1670s. (Etymology Online)
  • cuff (n.) "bottom of a sleeve," mid-14c., cuffe "hand covering, mitten, glove," perhaps somehow from Medieval Latin cuffia "head covering," of uncertain origin. Sense of "band around the sleeve" is first attested 1520s; sense of "hem of trousers" is 1911. (Etymology Online)

The "Rotator Cuff" is actually a group of 4 muscles that originate on the scapula and envelope the humeral head (like a "cuff" on the wrist).  The names of 3 of the muscles are actually the combination of anatomical directions and landmarks, indicating where the muscle is located.  The Acronym "S.I.T.S." is commonly used for the muscles of the rotator cuff, in the order listed below.

  • Supraspinatus -

    • supra = superior to the
    • spine = spine of the scapula
    • natus = a latin word meaning "born of"

      • originating superior to the spine of the scapula