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UE - Muscles
Intrinsic Shoulder Muscles
Question | Answer |
---|---|
Supraspinatus - Origin | Supraspinous Fossa |
Supraspinatus - Insertion | Superior 1/3rd Greater Tubercle of the Humerus |
Supraspinatus - Innervation | Suprascapular N. (C5-C6) |
Supraspinatus - Action | Initiates Humerus Abduction |
Supraspinatus - Blood Supply | Suprascapular A. |
Infraspinatus - Origin | Infraspinous Fossa |
Infraspinatus - Insertion | Middle 1/3rd Greater Tubercle of the Humerus |
Infraspinatus - Innervation | Suprascapular N. (C5-C6) |
Infraspinatus - Action | Lateral Rotation of the Humerus |
Infraspinatus - Blood Supply | Suprascapular A. & Circumflex Scapular A. |
Teres Minor - Origin | Infraspinous Fossa |
Teres Minor - Insertion | Middle 1/3rd Greater Tubercle of the Humerus |
Teres Minor - Innervation | Axillary N. (C5-C6) |
Teres Minor - Action | Lateral Rotation of the Humerus & Weak Adduction of the Humerus |
Teres Minor - Blood Supply | Posterior Humeral Circumflex A. & Circumflex Scapular A. |
Teres Major - Origin | Inferior Angle of Scapula & Inferior 1/2 of the Lateral Border of the Scapula |
Teres Major - Insertion | Medial Lip of the Intertubercular Groove of the Humerus |
Teres Major - Innervation | Lower Subscapular N. (C5-C6) |
Teres Major - Action | Humerus: Medial Rotation, Adduction, Weak Extension |
Teres Major - Blood Supply | Subscapular A. & Circumflex Scapular A. |
Subscapularis - Origin | Subscapular Fossa |
Subscapularis - Insertion | Lesser Tubercle of the Humerus |
Subscapularis - Innervation | Upper Subscapular N. (C5-C6) & Lower Subscapular N. (C5-C6) |
Subscapularis - Action | Medial Rotation of the Humerus |
Subscapularis - Blood Supply | Subscapular A. |
Serratus Anterior - Origin | Lateral 1st-9th Ribs |
Serratus Anterior - Insertion | Anterior Medial Border of the Scapula |
Serratus Anterior - Innervation | Long Thoracic N. (C5-C7) |
Serratus Anterior - Action | Scapula: Protraction, Upward Rotation, Holds Scapula Close to Thoracic Wall |
Serratus Anterior - Blood Supply | Lateral Thoracic A. (Upper Part) & Thoracodorsal A.(Lower Part) |
Deltoid - Origin | Lateral 1/3rd Clavicle, Acromion Process, Scapular Spine |
Deltoid - Insertion | Deltoid Tuberosity of the Humerus |
Deltoid - Innervation | Axillary N. (C5-C6) |
Deltoid - Action | Humerus: Abduction, Flexion, Extension |
Deltoid - Blood Supply | Posterior Humeral Circumflex A. & Pectoral Branch of the Thoracoacromial Trunk A. |