Anatomy & Physiology › Section J · The muscular system › Topic J.5
Muscles of the pectoral girdle and upper limbs
The shoulder is the most mobile joint in the body and the hand the most dexterous tool, and both depend on dozens of muscles working in layers. This topic works from the shoulder blade to the fingertips, giving each group's attachments and actions.
In this topic
- Four groups of muscles
- Muscles that position the pectoral girdle
- Muscles that move the humerus
- The rotator cuff
- Worked example: raising the arm overhead
- Muscles that move the forearm
- Worked example: turning a screwdriver
- Forearm muscles that move the wrist and fingers
- Intrinsic muscles of the hand
- Common mistakes to avoid
- Key takeaways
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