Lab 7 Flashcards
Levator Scapulae
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Transverse process of C1-4. Insertion: Medial edge of scapula. Innervation: Dorsal scapular nerve (C4,5). Function: Elevates scapula. Antagonist: Synergist:
Rhomboideus Major
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Spinous processes of T2-5.
Insertion: Medial edge of scapula.
Innervation: Dorsal scapular nerve (C4,5).
Function: Retracts, elevates, adducts scapula.
Antagonist:
Synergist:
Rhomboideus Minor
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Spinous process of C7-TI.
Insertion: Medial edge of scapula.
Innervation: Dorsal scapular nerve (C4,5).
Function: Retracts, elevates, and adducts scapula.
Antagonist:
Synergist:
Serratus Anterior
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Ribs 1-9.
Insertion: Medial border and inferior angle of scapula.
Innervation: Long thoracic nerve (C5,6).
Function: Protracts and stabilizes scapula.
Antagonist:
Synergist:
Deltoideus
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Lateral third of clavicle, acromion and spine of scapula.
Insertion: Deltoid tuberosity (lateral side) of humerus.
Innervation: Axillary nerve (C4,5,6).
Function: Elevates humerus.
Antagonist:
Synergist:
Teres Major
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Inferior apex of scapula.
Insertion: Anterior face of humerus (inter tubercular groove).
Innervation: Lower subscapular nerve (C5,6).
Function: Adducts, extends and medially rotates humerus.
Antagonist:
Synergist:
Teres Minor
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Lateral border of scapula. Insertion: Greater tubercle of humerus. Innervation: Axillary nerve (CS,6). Function: Laterally rotates humerus, stabilizes shoulder joint. Antagonist: Synergist:
Subscapularis
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Subscapular fossa of scapula.
Insertion: Lesser tubercle of humerus.
Innervation: Upper and lower subscapular nerves (C5,6).
Function: Medially rotates humerus, stabilizes shoulder joint.
Antagonist:
Synergist:
Brachioradialis
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Insertion: Innervation: Function: Antagonist: Synergist:
Supraspinatus
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Supraspinous fossa of scapula. Insertion: Greater tubercle of humerus. Innervation: Suprascapular nerve (C5,6). Function: Abducts humerus, stabilizes shoulder joint. Antagonist: Synergist:
Infraspinatus
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Infraspinous fossa of scapula. Insertion: Greater tubercle of humerus. Innervation: Suprascapular nerve (C5,6). Function: Laterally rotates humerus, stabilizes shoulder joint. Antagonist: Synergist:
Pectoralis Major (Clavicular Head) Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Medial half of clavicle.
Insertion:Lateral side of humerus (intertubercular groove).
Innervation: Medial and lateral pectoral nerves (C5,6).
Function: Adducts humerus.
Antagonist:
Synergist:
Pectoralis Minor
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Ribs (3-5). Insertion: Coracoid process of scapula. Innervation: Medial pectoral nerve (C6,7); carries both cranial ventral and caudal ventral fibers. Function: Depresses scapula. Antagonist: Synergist:
Biceps Brachii
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Long head, coracoid process of scapula: short head, anterior, proximal surface of humerus.
Insertion: Radial tuberosity of anterior face of radius.
Innervation: Musculocutaneous nerve (C5,6).
Function: Flexes humerus at shoulder; flexes and supinates forearm.
Antagonist:
Synergist:
Brachialis
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Anterior surface of humerus.
Insertion: Anterior face of proximal surface of ulna.
Innervation: Musculocutaneous nerve (C5,6).
Function: Flexes forearm.
Antagonist:
Synergist:
Triceps-Long Head
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Infraglenoid tubercle of scapula. Insertion: Olecranon process of ulna. Innervation: Axillary nerve (C4,5,6). Function: Extends and adducts forearm. Antagonist: Synergist:
Triceps-Lateral Head
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Posterior body and lateral surface of humerus. Insertion: Olecranon process of ulna. Innervation: Radial nerve (C7,8). Function: Extends forearm. Antagonist: Synergist:
Triceps-Medial Head
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Posterior Surface of Humerus. Insertion: Olecranon process of Ulna. Innervation: Radial Nerve (C7,8). Function: Extends forearm. Antagonist: Synergist:
Latissimus Dorsi
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Spines of T7-12, thoracolumbar facia.
Insertion: Bicipital groove (proximal end) of humerus.
Innervation: Thoracodorsal nerve (C7,8). A bit of C6.
Function: Retracts humerus, rotates scapula downward via attachement to humerus.
Antagonist:
Synergist:
Pectoralis Major (Sternal Head) Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Sternum; costal cartilages 1-6.
Insertion: Upper, lateral surface of humerus.
Innervation: Medial and lateral Pectoral nerves (C7,8,T1).
Function: Flexes, adducts and medially rotates humerus.
Antagonist:
Synergist:
Trapezius
Origin, Insertion, Innervation, Function, Antagonist, and Synergist
Origin: Superior, Occipital bone; middle, ligament niche; inferior, spine of vertebrae.
Insertion: Superior, lateral third of clavicle and part of acromion process of scapula; middle, acromion and spine of scapula, inferior, spine of scapula.
Innervation: Motor, cranial nerve XI
Function (Superior Portion): adducts and elevates scapula.
Function (Middle Portion): Retracts scapula.
Function (Inferior Portion): Depresses Scapula.
Antagonist:
Synergist:
