47 terms

Muscle's Origin, Insertion, Action, and Innervation

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Prime Movers of the Shoulder Girdle
Upper Trapezius
O: Occipital Bone, nuchal ligament, upper cervical SP
I: Outer Third of the clavicle
A: Scapular elevation and downward rotation
N:Spinal Accessory(CNXI) C3,C4 sensory
Middle Trapezius
O: Spinous Processes of C7-T3
I: Scapular Spine
A: Scapular Retraction
N: Spinal Accessory (CN XI) C3,C4 sensory component
Lower Trapezius
O: SP of middle and lower TX vertebrae
I: Base of the scapular spine
A:Scapular depression and upward rotation
N: Spinal Accessory (CN XI), C3,C4 Sensory Component
Levator Scapulae
O: TP of C1-C4
I:Vertebral border of the scapula b/w the superior angle and the spine
A: Scapular elevation and downward rotation
N: 3rd and 4th cervical nerves and dorsal scapular nerve
Rhomboids
O: SP of C7-T5
I: Vertebral Border of the scapula b/w the spine and inferior angle
A: Scapular retraction, elevation, and downward rotation
N: Dorsal Scapular (C5)
Serratus Anterior
O: Lateral Surface of the upper 8 ribs
I: Vertebral border of the scapula, anterior surface
A: Scapular protraction and upward rotation
N: Long thoracic (C5-C7)
Pectoralis Minor
O: Anterior surface 3rd to 5th ribs
I: Coracoid Process of the scapula
A: Scapular depression, protraction, downward rotation and tiltd
N: Medial Pectoral (C8,T1)
Prime Movers of Elbow and Forearm
Elbow Flexion
-Biceps
-Brachialis
-Brachioradialis
Elbow Extension
-Triceps
Forearm Pronation
-Pronator teres
-Pronator quadratus
Forearm Supination
-Biceps
-Supinator
Brachialis
O: distal half of humerus, anterior surface
I: coronoid process and ulnar tuberosity
A: elbow flexion
N: musculocutaneous nerve (C5, C6)

Note: no attachment on the radius=no role in pronation and supination
Bicep Brachii "biceps"
O:
Long head: supraglenoid tubercle of scapula
Short head: Coracoid process of scapula
I: radial tuberosity of radius
A: elbow flexion, forearm supination
N: musculocutaneous nerve (C5, C6)
Brachioradialis
O: Lateral supracondylar ridge on the humerus
I: Styloid process of the radius
A: elbow flexion
N: radial nerve (C5,C6)
Triceps muscle: 3 heads
O:
Long head: infraglenoid tubercle of scapula
Lateral head: inferior to greater tubercle on posterior humerus
Medial head: posterior surface of humerus
I: olecranon process of ulna
A: elbow extension
N: radial nerve (C7,C8)
Pronator teres
O: medial epicondyle of the humerus and coronoid process of ulna
I: lateral aspect of radius at its midpoint
A: forearm pronation, assistive in elbow flexion
N: Median nerve (C6,C7)
Supinator muscle
O: lateral epicondyle of humerus and adjacent ulna
I: anterior surface of the proximal radius
A: forearm supination
N: radial nerve (C6)
Pronator quadratus
O: Distal ¼ of ulna
I: Distal ¼ of radius
A: Forearm pronation
N: median nerve (C8,T1)
Anconeus Muscle
O: Lateral epicondyle of humerus
I: Lateral and inferior to olecranon process of ulna
A: Assists in elbow extension (not a prime mover)
N: Radial nerve (C7,C8)
Flexor Carpi Ulnaris
O: Medial Epicondyle
I: Pisiform and base of 5th MT
A: Wrist Flexion, ulnar deviation
N. Ulnar Nerve
Flexor Carpi Radialis
O: Medial Epicondyle
I: Base of the 2nd and 3rd MT
A: wrist flexion and radial deviation
N: Median N.
Palmaris Longus
O: Medial Epicondyle
I: Palmar fascia
A: Assist in wrist flexion
N: Median Nerve
Extensor Carpi Radialis Longus
O: Supracondylar ridge of the humerous
I: Base of the 2nd MC
A: Wrist extension, radial deviation
I: Radial N
Extensor Carpi Radialis Brevis
O: Lateral Epicondyle
I: Base of the 3rd MC
A: Wrist Extension
N: Radial N
Extensor Carpi Ulnaris
O: Lateral Epicondyle
I: Base of the 5th MC
A: Wrist extension, ulnar deviation
N. Radial
Flexor Digitorum Superficialis
O: Medial Epicondyle, Coronoid Process and Radius
I: Side of the middle phalanx 1-4
A: Flex MCP and PIP
N: Median
Flexor digitorum profundus
O: upper ¾ of the ulna
I: Distal Phalanx 1-4
A: Flexes MCP, PIP and DIP
N: Median and Ulnar
Prime Movers of the Neck and Trunk
Iliopsoas
O: iliac fosse, anterior and lateral surfaces of T12 through L5
I: lesser trochanter
A: Hip Flexion
*one joint muscle*
N: Femoral Nerve
Rectus Femoris
O: AIIS
I: tibial tuberosity
A: hip flexion, knee extension
N: femoral nerve
Sartorius
O: ASIS
I: proximal medial aspect of tibia
A: hip flexion, abduction, and lateral rotation as well as knee flexion
N: femoral nerve
Pectineus
O: superior ramus of pubis
I: pectineal line of femur (posterior side)
A: hip flexion and adduction
N: femoral nerve*
Adductor Longus
O: Pubis
I: Middle third of linea aspera
A: Hip Adduction
N: Obturator Nerve
Adductor Brevis
O: Pubis
I: Pectineal line and proximal line aspera
A: hip adduction
N: obturator nerve
Adductor Magnus
O: ischium and pubis
I: Entire linea aspera and adductor tubercle
A: hip adduction
N: Obturator nerve
Gracilis
*the only 2 joint hip adductor
O: Pubis
I: anterior medial surface of proximal end of tibia
Hip Adduction
N: Obturator nerve
Gluteus Maximus
O: posterior sacrum and ilium
I: posterior femur distal to greater trochanter and to IT band
A: hip extension, hyperextension, lateral rotation
N: inferior gluteal nerve (L5,S1, S2)
Gluteus Medius
O: outer surface of the ilium
I: lateral surface of the greater trochanter
A: hip abduction
N: superior gluteal nerve (L4-S1)
Gluteus Minimus
O: lateral ilium
I: anterior surface of the greater trochanter
A: hip abduction, medial rotation
N: superior gluteal nerve (L4-S1)
Piriformis
Deep Rotator Muscles
O: posterior sacrum
I: greater trochanter
A: Hip lateral rotators (also has other actions)
N: S1, S2 segments
Semimembranosus
O: Ischial Tuberosity
I: Posterior surface of medial condyle of tibia
A: extend hip and flex knee
N: sciatic nerve (L5-S2)
Semitendinosus
O: Ischial tuberosity
I: anteromedial surface of proximal tibia
A: extend hip and flex knee
N: Sciatic nerve (L5-S2)
Bicep Femoris
O: Long head- ischial tuberosity, Short head - lateral lip of linea aspera
I: fibular head
A: long head: extend hip and flex knee; short head: flex knee
N: Long head: sciatic nerve; short head: common peroneal nerve
Tensor Fascia Latae (TFL)
O: ASIS
I: lateral condyle of tibia
A: combine hip flexion and abduction
N: superior gluteal nerve

IT Band
Long fascia type band
Vastus Lateralis
O: Line aspera
I: tibial tuberosity via patellar tendon
A: knee extension
N: femoral nerve (L2, L3, L4)
Vastus Medialis
O: Linea aspera
I: Tibial tuberosity via patellar tendon
A: knee extension
N: femoral nerve (L2, L3, L4)
Vastus Intermedialis
O: Anterior femur
I: tibial tuberosity via patellar tendon
A: knee extension
N: femoral nerve (L2, L3, L4)
Popliteus
O: lateral condyle of the femur
I: posterior medial condyle of tibia
A: Initiates knee flexion
N: Tibial nerve (L4-S1)

Known as the "key" to the knee.
Gastrocnemius
O: medial and lateral condyle of femur
I: posterior calcaneous
A: knee flexion, ankle plantar flexion
N: tibial nerve (S1,S2)
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