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88 Cards in this Set
- Front
- Back
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Pectoralis Major Origin
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Clavicular Head- anterior surface of medial half of clavicle
Sternocostal Head- Anterior sternum, upper six costal cartilages, aponeurosis of external oblique muscle |
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Pectoralis Major Insertion
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Lateral lip of intertubercular sulcus of humerus
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Pectoralis Major Innervation
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Clavicular Head- Lateral and medial pectoral nerves (C5,C6)
Sternocostal Head- Lateral and medial pectoral nerves(C7,C8,T1) |
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Pectoralis Major Actions
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Together-Adduct and medially rotate arm
Clavicular head- Flex arm Sternocostal Head- extends arm to neutral from a flexed position |
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Pectoralis Minor Origin
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Anterior surface of ribs III-V
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Pectoralis Minor Insertion
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Medial surface of coracoid process of scapula
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Pectoralis Minor Innervation
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Medial pectoral nerve (C8,T1)
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Pectoralis Minor Action
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Stabilizes scapula by pulling it inferiorly and anteriorly
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Subclavius Origin
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Junction of rib I and its costal cartilage
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Subclavius Insertion
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Groove on inferior surface of middle third of clavicle
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Subclavius Innervation
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Subclavian nerve (C5,C6)
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Subclavius Action
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Depress clavicle down and forward
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Serratus Anterior Origin
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External Surfaces of ribs I-VIII
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Serratus Anterior Insertion
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Anterior surface of medial border of scapula
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Serratus Anterior Innervation
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Long Thoracic Nerve (C5,C6,C7)
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Serratus Anterior Action
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Protracts scapula, rotates scapula upward so that glenoid cavity faces upward, holds scapula against thoracic wall
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Trapezius Origin
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Descending-Medial third superior nuchal line, external occipital protuberance, spinous processes C1-C7 via nuchal ligament
Transverse- spinous processes T1-T4 Ascending- spinous processes T5-T12 |
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Trapezius Insertion
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Descending-lateral third of posterior clavicle
Transverse-medial acromion of scapula Ascending- superior edge of spine of scapula |
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Trapezius Innervation
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Spinal root of accessory nerve (CNXI) and branches of ventral rami C3,C4
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Trapezius Action
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Descending- Elevates scapula
Transverse- Retracts scapula Ascending- Depresses scapula Ascending + Descending- upward rotation of scapula |
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Latissimus Dorsi Origin
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Spinous processes TVII-TXII, thoracolumbar fascia, iliac crest, lower 3-4 ribs
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Latissimus Dorsi Insertion
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Floor of intertubercular sulcus of humerus
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Latissimus Dorsi Innervation
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Thoracodorsal nerve (C6,C7,C8)
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Latissimus Dorsi Action
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Extends, adducts and medial rotates arm
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Levator Scapulae Origin
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Posterior tubercles of transverse processes CI-CIV
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Levator Scapulae Insertion
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Medial border of scapula above base of the spine of the scapula
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Levator Scapulae Innervation
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Dorsal scapular nerve (C5) and branches from ventral rami (C3,C4)
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Levator Scapulae Action
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Elevates scapula medially, inferiorly rotates glenoid cavity
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Rhomboid Minor Origin
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Nuchal ligament, spinous processes of CVII-TI
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Rhomboid Minor Insertion
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Medial border of scapula at base of the spine of the scapula
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Rhomboid Minor Innervation
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Dorsal Scapular nerve (C4,C5)
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Rhomboid Minor Action
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Retracts and stabilizes the scapula
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Rhomboid Major Origin
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Spinous processes of TII-TV
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Rhomboid Major Insertion
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Medial border of scapula below base of spine of the scapula
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Rhomboid Major Innervation
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Dorsal Scapular nerve (C4,C5)
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Rhomboid Major Action
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Retracts scapula and rotates scapula downward so that glenoid cavity faces downward
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Deltoid Origin
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Lateral third of anterior clavicle, lateral acromion of scapula, inferior edge of spine of the scapula
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Deltoid Insertion
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Deltoid tuberosity of the humerus
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Deltoid Innervation
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Anterior and Posterior branches of axillary nerve (C5,C6)
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Deltoid Actions
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Clavicular part- flexes and medially rotates arm
Acromial part- abducts arm Spinal part- extends and laterally rotates arm |
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Supraspinatus Origin
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Supraspinous fossa of scapula
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Supraspinatus Insertion
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Superior facet of greater tubercle of humerus
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Supraspinatus Innervation
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Suprascapular nerve (C5,C6)
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Supraspinatus Action
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Initiates arm abduction, acts with rotator cuff muscles
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Infraspinatus Origin
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Infraspinous fossa of scapula
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Infraspinatus Insertion
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Middle facet of greater tubercle of humerus
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Infraspinatus Innervation
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Suprascapular nerve (C5,C6)
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Infraspinatus Action
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Lateral rotation of arm, acts with rotator cuff muscles
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Teres Minor Origin
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Middle part of posterior surface of lateral border of scapula
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Teres Minor Insertion
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Inferior facet of greater tubercle of humerus
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Teres Minor Innervation
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Posterior branch of axillary nerve (C5,C6)
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Teres Minor Action
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Lateral rotation and adduction of arm
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Teres Major Origin
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Posterior surface of inferior angle of scapula
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Teres Major Insertion
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Medial lip of intertubercular sulcus of humerus
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Teres Major Innervation
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Lower Subscapular nerve (C6,C7)
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Teres Major Action
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Adducts and medially rotates arm
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Subscapularis Origin
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Subscapular fossa of scapula
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Subscapularis Insertion
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Lesser tubercle of humerus
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Subscapularis Innervation
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Upper and Lower subscapular nerves (C5,C6,C7)
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Subscapularis Action
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Medially rotates and adducts arm
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Biceps Brachii Origin
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Long head- supraglenoid tubercle of scapula
Short head-tip of coracoid process of scapula |
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Biceps Brachii Insertion
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Radial tuberosity, fascia of forearm via bicepital aponeurosis
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Biceps Brachii Innervation
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Musculocutaneous nerve (C5,C6)
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Biceps Brachii Action
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Flex and supinates forearm
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Coracobrachialis Origin
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Tip of coracoid process of scapula
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Coracobrachialis Insertion
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Middle third of medial surface of humerus
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Coracobrachialis Innervation
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Musculocutaneous nerve (C5,C6,C7)
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Coracobrachialis Action
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Flexes and adducts arm
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Brachialis Origin
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Distal half of anterior surface of humerus
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Brachialis Insertion
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Coronoid process and tuberosity of ulna
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Brachialis Innervation
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Musculocutaneous nerve (C5,C6)
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Brachialis Action
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Flexes forearm
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Triceps Brachii Origin
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Long head- infraglenoid tubercle of scapula
Lateral head-upper half of posterior humerus Medial head- distal two-thirds of medial and posterior humerus |
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Triceps Brachii Insertion
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Posterior surface of olecranon process of ulna
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Triceps Brachii Innervation
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Radial nerve (C6,C7,C8)
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Triceps Brachii Action
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Extends forearm, long head stabilizes head of abducted humerus
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Anconeus Origin
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Posterior surface of lateral epicondyle of humerus
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Anconeus Insertion
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Lateral surface of olecranon and posterior proximal ulna
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Anconeus Innervation
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Radial nerve (C7-T1)
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Anconeus Action
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Assists triceps brachii in extending forearm
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Serratus Posterior superior Origin
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nuchal ligament and spinous processes C7-T3
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Serratus Posterior superior Insertion
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upper borders of ribs II-V
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Serratus Posterior superior Innervation
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T2-T4 intercostal nerves
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Serratus Posterior superior Action
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Elevates ribs; inspiration
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Serratus Posterior inferior Origin
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Vertebrae T11-L3
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Serratus Posterior inferior Insertion
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inferior border of ribs 9-12
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Serratus Posterior inferior Innervation
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T9-T11 intercostal nerves and subcostal nerve (T12)
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Serratus Posterior inferior Action
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Fixes and depresses lower ribs, acts in expiration
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