ANATOMY–UB–CHEST-REGION-MUSCLES-PECTORALIS MAJOR

ANATOMY – MUSCLES – PECTORALIS MAJOR

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  1. UPPER CLAVICULAR
    (1) Ab·duction
    (2) Horizontal Ad·duction (Horizontal Flexion)
    (3) Internal (Medial) Rotation
    (4) Flexion
  2. MIDDLE STERNAL
    (1) Ad·duction
    (2) Horizontal Ad·duction (Horizontal Flexion)
    (3) Internal (Medial) Rotation
    (4) Flexion
  3. LOWER COSTAL
    (1) Ad·duction
    (2) Horizontal Ad·duction (Horizontal Flexion)
    (3) Internal (Medial) Rotation
    (4) Extension

RADIO GRAPHICS .
– The pectoralis major muscle consists of clavicular (20%) and sternal heads (80%). The clavicular head is a single architectural segment that cannot be further divided. It’s within the clavicular lamina and arises from the medial half of the clavicle.
– The sternal head can be subdivided into 6 to 7 segments along individual fascial planes. The segments are within the abdominal and manubrial laminae and arise from the anterior manubrium, sternum, and second to sixth costal cartilages.

YOUTUBE VIDEOS

  1. LARGE SHOULDER MUSCLES – 11:40 – SAM WEBSTER – 2017
  2. PECTORALIS MAJOR – ANATOMY ZONE – 2016

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