Origin, Insertion, Action, Innervation Flashcards
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
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
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
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
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)
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
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
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
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
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
Supraspinatus
Origin: Supraspinous Fossa of scapula
Insertion: Greater Tubercle
Action: assist deltoid in initial abduct
Innervation: ssprascapular nerve
Infraspinatus
Origin: Infraspinous fossa
Insertion: Greater tubercule
Action: Laterally rotates arm
Innervation: Suprascapular nerve
Teres Minor
Origin: Middle Lateral border of scapula
Insertion: Greater Tubercle
Action: Laterally rotates, adducts arm
Innervation: Axillary nerve
Teres Major
Origin: Inferior lateral border of scapula
Insertion: Intertubercular sulcus
Action: adducts, medially rotates, extends arm (dorsally)
Innervation: Lower subscapular nerve
Subscapularis
Origin: Subscapular fossa
Insertion: Lesser Tubercle
Action: MEdially Rotates
Innervation: upper/lower subscapular nerve
Biceps Brachii
Origin:
Supraglenoid tubercle
Coracoid process
Insertion: Tuberosity of radius/bicipital aponeuronsis
Action: flexes at elbow, powerful supinator, flexes arm
Innervation: Musculocutaneous
Brachialis
Origin: Humerous
Insertion: Ulnar Tuberosity/Coronoid process
Action: Flexes forearm
Innervation: Musculocutanerous
Coracobrachialis
Origin: coracoid process
Insertion: shaft of humerus
Action: flexes, adducts
Innervation: musculotaneous
Triceps Brachii
Origin: infraglenoid, humerous, (superior, inferior of radial groove)
Insertion: olecranon of ulna
Action: Extends forearm, extends arm
Innervation: Radial
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
