A Draing A Day 1372

Progress Shot 13

Graphite and White Chalk on prepared Canson Mi–Teintes paper, 55 x 37cm

1/ Teres Minor (posterior view)
Action: Laterally rotates arm, helps to hold head of humerus in the glenoid cavity

2/ Subscapularis (anterior view)
Action: Medially rotates and adducts arm, helps to hold head of humerus in the glenoid cavity

3/ Serratus Anterior
Action: Draws forward and rotates the scapula, holds it against thoracic wall

4/ Teres Minor
Action: Laterally rotates arm, helps to hold head of humerus in the glenoid cavity

5/ Infraspinatus
Action: Laterally rotates arm

6/ Supraspinatus
Action: Initiates arm abduction

7/ Levator Scapulae
Action: Elevates scapula medially and rotates scapula tilting glenoid cavity inferiorly

8/ Rhomboideus Minor
Action: Retracts, elevates and rotates the scapula, fixes scapula to thoracic wall

9/ Rhomboideus Major
Action: Retracts, elevates and rotates the scapula, fixes scapula to thoracic wall

10/ Pectoralis Minor
Action: Draws the scapula downward and anteriorly, stabilises scapula

11/ Pectoralis Major
Action: Adducts, flexes and medially rotates arm

12/ Deltoideus
Action:
Clavicular Part:
 Flexes and medially rotates arm
Acromial Part: Abducts arm
Spinal Part: Extends and laterally rotates arm

13/ Trapezius
Action:
Descending Part:
 Elevates scapula
Transverse Part: Retracts scapula
Ascending Part: Depresses scapula, rotates the scapula superiorly

A Drawing A Day 1359

Progress Shot 13

Graphite and White Chalk on Canson Mi–Teintes paper, 55 x 37cm

1/ Teres Minor (posterior view)
Action: Laterally rotates arm, helps to hold head of humerus in the glenoid cavity

2/ Subscapularis (anterior view)
Action: Medially rotates and adducts arm, helps to hold head of humerus in the glenoid cavity

3/ Serratus Anterior
Action: Draws forward and rotates the scapula, holds it against thoracic wall

4/ Teres Minor
Action: Laterally rotates arm, helps to hold head of humerus in the glenoid cavity

5/ Infraspinatus
Action: Laterally rotates arm

6/ Supraspinatus
Action: Initiates arm abduction

7/ Levator Scapulae
Action: Elevates scapula medially and rotates scapula tilting glenoid cavity inferiorly

8/ Rhomboideus Minor
Action: Retracts, elevates and rotates the scapula, fixes scapula to thoracic wall

9/ Rhomboideus Major
Action: Retracts, elevates and rotates the scapula, fixes scapula to thoracic wall

10/ Pectoralis Minor
Action: Draws the scapula downward and anteriorly, stabilises scapula

11/ Pectoralis Major
Action: Adducts, flexes and medially rotates arm

12/ Deltoideus
Action:
Clavicular Part:
 Flexes and medially rotates arm
Acromial Part: Abducts arm
Spinal Part: Extends and laterally rotates arm

13/ Trapezius
Action:
Descending Part:
 Elevates scapula
Transverse Part: Retracts scapula
Ascending Part: Depresses scapula, rotates the scapula superiorly