Origin, Insertion, Action, Innervation Flashcards by Noah Chance

Pectoralis Major

Origin: Clavicle, Sternum, Costal Cartilages: 2-5, 2-6, or 1-7
Insertion: Intertubercular Sulcus (Groove) of Humerus
Action: Adducts, medially rotates humerous at shoulder joint
Innervation: Lateral/Medial Pectoral Nerves
Arterial Supply: Pectoral banch of the thoracoacromial artery

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Pectoralis Minor

Origin: 2-5, 3-5, 2-4 Ribs
Insertion: Coracoid process of scapula
Action: adducts (protracts scapula and rotates downward, elevates ribs during forced inhalation
Innervation: medial pectoral nerve 
Arterial Supply: Lateral thoracic artery

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Serratus Anterior

Origin: Superior 8-9 Ribs
Insertion: Vertebral border/inferior angle of scapula
Action: adducts scapula and rotates it upward, elevates ribs when scapula is fixed
Innervation: Long thoracic Nerve
Arterial Supply: Lateral thoracic Artery

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Subclavius Muscle

Origin: First Rib
Insertion: Clavicle
Action: Depresses clavicle, moves it anteriorly, stabilizes girdle
Innervation: Subclavian Nerve
Arterial Supply: Clavicular branch of the thoracoacromial artery

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Trapezius

Origin:External occipital protuberance, superior nuchal line, nuchal ligament, spinous processes of C7-T12
Insertion: Clavicle, acromion and spine of scapula
Action: Elevate, adduct (retract), Depress scapula
Innervation: Accessory Nerve (CN XI)
Arterial Supply: Transverse cervical artery (Supplies upper 2/3) Dorsal scapular artery (1/3)

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Latissimus Dorsi

Origin: Spinous process of inferior 6T vertebre, (T7-L5) crests of sacrum and illium
Insertion: Intertubercular Sulcus
Action: Extends, adducts, medially rotates humerous at shoulder joint/ dras arm inferiorly and posteriorly/raises body toward arms during climbing
Innervation: thoracodorsal nerve
Arterial Supply: thoracodorsal artery

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Levator Scapulae

Origin: Superior 4/5 cervical vertebrae
Insertion: Superior Vertebral border of scapula 
Action: Elevates Scapula
Innervation: Dorsal Scapular nerve 
Arterial Supply: Dorsal scapular artery

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Rhomboid Major

Origin: Spinous process of thoracic vertebrae
Insertion: medial vertebral border of scapula inferior to the scapular spine
Action: Elevates,addicts scapula, stabilizes scapula
Innervation: Dorsal Scapular nerve
Arterial Supply: Dorsal Scapular Artery

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Rhomboid Minor

Origin: Spinous Processes of C7 and T1 vertebrae
Insertion: Medial border of scapula superior to scapula spine
Action: Elevates, retracts scapula, stabilizes scapula
Innervation:Dorsal Scapular nerve
Arterial Supply: Dorsal Scapular Artery

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Deltoid

Origin: Acromial Extremity, Acromion and spine of scapula
Insertion: Deltoid Tubersoity
Action: Abducts arm, medially rotate, extend and laterally rotate arm
Innervation: Axillary Nerve

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Supraspinatus

Origin: Supraspinous Fossa of scapula
Insertion: Greater Tubercle
Action: assist deltoid in initial abduct
Innervation: ssprascapular nerve

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Infraspinatus

Origin: Infraspinous fossa
Insertion: Greater tubercule
Action: Laterally rotates arm
Innervation: Suprascapular nerve

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Teres Minor

Origin: Middle Lateral border of scapula
Insertion: Greater Tubercle
Action: Laterally rotates, adducts arm
Innervation: Axillary nerve

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Teres Major

Origin: Inferior lateral border of scapula
Insertion: Intertubercular sulcus
Action: adducts, medially rotates, extends arm (dorsally)
Innervation: Lower subscapular nerve

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Subscapularis

Origin: Subscapular fossa
Insertion: Lesser Tubercle
Action: MEdially Rotates
Innervation: upper/lower subscapular nerve

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Biceps Brachii

Origin:
Supraglenoid tubercle
Coracoid process
Insertion: Tuberosity of radius/bicipital aponeuronsis
Action: flexes at elbow, powerful supinator, flexes arm
Innervation: Musculocutaneous

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Brachialis

Origin: Humerous
Insertion: Ulnar Tuberosity/Coronoid process
Action: Flexes forearm
Innervation: Musculocutanerous

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Coracobrachialis

Origin: coracoid process
Insertion: shaft of humerus
Action: flexes, adducts
Innervation: musculotaneous

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Triceps Brachii

Origin: infraglenoid, humerous, (superior, inferior of radial groove)
Insertion: olecranon of ulna
Action: Extends forearm, extends arm
Innervation: Radial

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Anconeus

Origin: Lateral Epicondyle
Insertion: olecranon
Action: Extends forarm, assist tri
Innervation: radial nerve

Flexor Carpi Radialis

Origin: Medial Epicondyle
Insertion: radial anterior of hand, 2-3 meta carpals
Action: flexes and abducts hand at wrist
Innervation: median nerve

Palmaris Longus

Origin: medial epicondyle
Insertion: Flexor retinaculum
Action: flexes hand at wrist, tightens palmar aponeurosis
Innervation: median nerve

Flexor Carpi Ulnaris

Origin: Medial epicondyle, olecranon (posterior border of ulna)
Insertion: Ulnar anterior hand carpals
Action: flexes, adducts hand at wrist
Innervation: ulnar artery

Flexor Digitorum Superficialis

Origin: Medial Epicondyle
Insertion: Anterior surface of middle ph, 2-5
Action: flexes fingers, flexes hand at wrist
Innervation: Median Nerve

Flexor Pollicis Longus

Origin: Radus/Interosseus membrane Insertion: Distal Phalanx of thumb Action: Flexes distal/phalanx of thumb Innervation: median nerve

Flecor Digitorum Profundus

Origin: Ulnar/Interossous Insertion: Anterior Surface/distal 2-5 Action: flexes fingers at distal phalanges, assist with hand flexion Innervation:median/ulnar nerve

Brachioradialis

Origin: Humerus (near stylpid) Insertion: radius Action: pronate/supinate, flexes forearm Innervation: radial nerve

Extensor Carpi Radialis Longus

Origin: distal humerus Insertion: radial posterior Action: extends/abducts hand at wrist Innervation: radial nerve

Extensor Carpi Radialis Brevis

Origin: lateraly epicondyle Insertion: radial posterior of hand, base of 3rd meta Action: extends abducts hand Innervation: deep radial nerve

Extensor Digitorum

Origin: lateral epicondyle Insertion: digits 2-5, phal. Action: extends digits2-5 Innervation: deep radial nerve

Extensor Digiti Minimi

Origin: lateral epicondyle Insertion: phalanx of little finger Action: extends the 5th digit Innervation: deep radial

Extensor Carpi Ulnaris

Origin: Lateral epicondyle Insertion: Ulnar posterior hand, base of 5th meta Action: extends/adducts hand Innervation: deep radial nerve

Abductor Pollicis Longus

Origin: posterior radus/ulna Insertion: base of thumb, 1st meta Action: abducts and extends thumb Innervation: deep radial nerve

Extensor Pollicis Brevis

Origin: posterior radius Insertion: proximal phalnx of thumb Action: extends thumb Innervation:deep radial nerve

Extensor Pollicis Longus

Origin: Posterior ulna Insertion: distal phalanx of thumb Action: extends thumb Innervation: deep radial nerve

Extensor Indicis

Origin: Ulna Insertion: Index finger Action: extends second digit Innervation: deep radial

Pronator Teres

Origin: medial epicondyle Insertion: radius Action: pronates forearm Innervation: median nerve

Pronator Quadratus

Origin: ulna Insertion: radius Action: pronates forearm Innervation: median nerve

Supinator

Origin: humerous (lateral) Insertion: Proximal radius Action: supinates forearm Innervation: deep radial nerve

Abductor Pollicis Brevis

Origin: flexor retinaculum, scaphoid, trapezium Insertion: lateral side of thumb phalanx Action: abducts thumb Innervation:median nerve

Opponens Pollicis

Origin: flexor retinaculum, scaphoid, trapezium Insertion: lateral 1st meta Action: 1st meta medially to oppose little finger at palm Innervation: median nerve

Flexor Pollicis Brevis

Origin: flexor retinaculum, scaphoid, trapezium Insertion: lateral side of thumb phalanx Action: flexes thumb Innervation: median/ulnar nerves

Adductor Pollicis

Origin: anterior 2nd/3rd metacarpal, Insertion: medial side of thumb phalanx Action: draws thumb toward palm (adducts thumb) Innervation: Ulnar nerve

Abductor Digiti Minimi

Origin: pisiform Insertion: medial side of proximal little finger Action: abducts 5th finger Innervation: ulnar nerve

Flexor Digiti Minimi Brevis

Origin: flexor retinaculum/hook of hamate Insertion: medial side of little finger Action: flexes 5th finger Innervation: ulnar nerve

Oppoens Digiti Minimi

Origin: flexor retinaculum and hamate Insertion: medial 5th metacarpal Action: draws 5th anteriorly Innervation: ulnar nerve

Palmar Interossei

Origin: palmar surfaces of metacarpals Insertion: 2,4,5 digits Action: adducts and flexes fingers Innervation: ulnar nerve

Dorsal Interossei

Origin: adjacent sides of two metacarpals Insertion: Action: abducts digits/extend fingers Innervation: ulnar