MRCEM Notes

Pectoral Region

Knowledge of the anatomy of the pectoral region is required as set out on page 1 of the CEM syllabus. This is limited to surface anatomy, innervation and action of the key muscles.

Knowledge of the following muscles is required:

MuscleInnervationNerve root origins
Pectoralis MajorMedial & lateral pectoral nerveC5 to T1
Pectoralis MinorMedial pectoral nerveC8 and T1
TrapeziusAccessory nerve & C3/C4See innervation
Latissimus DorsiThoracodorsal nerveC6 to C8
Serratus AnteriorLong thoracic nerveC5 to C7

Diagram illustrating position of Pectoralis Major muscle


Diagram illustrating position of Pectoralis Minor


Diagram illustrating Trapezius


Diagram illustrating Latissimus Dorsi


Diagram illustrating Serratus Anterior

Full-size image