ANATOMY – UB – BACK – MUSCLES – TRAPS, RHOMBOIDS & LEVATOR SCAPULAE

MUSCLES – TRAPS | RHOMBOIDS | LEVATOR SCAPULAE

Click on Image to Enlarge

1

TRAPEZIUS

source: Physiopedia .

  1. Upper Descending part: elevates pectoral girdle[1]
  2. Middle part: retracts scapula[1]
  3. Lower Ascending part: depresses shoulders[1]
  4. Upper Descending and Lower Ascending together: rotates scapula upwards[1]
  5. Bilateral contraction: extends neck[4]
  6. Unilateral contraction:
    • Ipsilateral side flexion of neck[4]
    • Middle part: assists with ipsilateral side flexion and contralateral axial rotation of upper thoracic region[4]

RHOMBOIDS

  • Scapular Retraction
  • Scapular Elevation
  • Scapular Rotation Inferiorly to Depress Glenoid Cavity
  • Assist Serratus Anterior to Fix Scapula to Thoracic Wall and Fix Scapula during movements of the upper limb

LEVATOR SCAPULAE

  • Elevates Scapula & Tilts the glenoid cavity inferiorly by rotating the scapula downward. [6]
  • If the scapula is fixed, a contraction of the levator scapulae leads to the lateral flexion of the cervical vertebral column to the side and stabilizes the vertebral column during rotation.

VIDEOS

  1. Abelson Chiro – 18 Muscles of the Spine – Start at 10:50
  2. Noted Anatomist – Scapulothoracic Joint .
    (1) Traps (2) Levator Scapulae (3) Rhomboids (4) Serratus Anterior (5) Pectoralis Minor (6) Subclavius
  3. Noted Anatomist – Superficial Back Muscles .
    (1) Traps (2) Rhomboids (3) Levator Scapulae (4) Latissimus Dorsi
  4. Noted Anatomist – Glenohumeral Joint .
    (1) Pectoralis Major (2) Teres Major (3) Latissimus Dorsi
  5. Anatomy Zone – Extrinsic Muscles .
  6. Webster – Large Shoulder Muscles .
    – Traps 6:15 | LATS 9:15 | Rhomboids 17:30 | Levator Scapulae 18:30 | Teres Major 20:20

 

Comments are closed.