muscles Flashcards by Claire Jamieson

Erector spinae muscles (as a group):

origin

insertion

action

innervation

origin: iliac crest and posterior surface of the sacrum and lumbar SPs

insertion: SPs and TVPs of the cervical and thoracic spinal and the capitis

action: EXTENSION

innervation: posterior rami of spinal nerves

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Sternocleidomastoid:

origin

insertion

action

innervation

origin: manubrium of sternum

insertion: mastoid process of temporal bone

action: contralateral rotation of head and neck

innervation: spinal accessory nerve

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Scalene Group:

origin

insertion

action

innervation

origin : TVPs of C3-C7

insertion: 1st and 2nd rib

action: lateral flexion

innervation: Anterior rami of cervicle spinal nerves

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Temporalis:

origin

insertion

action

innervation

origin : Temporal fossa and fascia

insertion: Coronoid process and ramus of mandible

action: Elevate and retract mandible

innervation: mandibular nerve

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Masseter:

origin

insertion

action

innervation

origin: zygomatic arch

insertion: ramus of mandible

action: elevate and protract mandible

innervation: mandibular nerve

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Rectus Abdominis:

origin

insertion

action

innervation

origin : pubic crest

insertion: xiphoid process and ribs 5,6,7

action: flex trunk

innervation: intercostal nerve

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External abdominal Oblique Muscle:

origin

insertion

action

innervation

origin: lower 8 ribs

insertion: linea alba and iliac crest

action: contralateral rotation

innervation: intercostal nerve

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Rhomboid Major & Minor:

origin

insertion

action

innervation

origin :
Minor: SPs of C7 and T1
Major: SPs of T2-T5

insertion: medial border of scapula

action: retraction (adduction) of scapula

innervation: dorsal scapular

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Trapezius:

origin

insertion

action

innervation

origin: occipital protuberance and SPs of T1-T12

insertion: lateral clavicle, acromion and spine of scapula

action: elevate, depress, retract, upward rotation of scapula

innervation: spinal accessory

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Latissimus Dorsi:

origin

insertion

action

innervation

origin: SPs of T7-L5 and crests of ilium and sacrum

insertion: bicipital groove of humerus

action: adduct, extend and medially rotate arm

innervation: thoracodorsal nerve

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Serratus Anterior:

origin

insertion

action

innervation

origin: upper 9 ribs

insertion: anterior medial scapula

action: protract (abduct) and upward rotation of scapula

innervation: long thoracic

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Pectoralis Major:

origin

insertion

action

innervation

origin: medial clavicle and sternum

insertion: bicitpal groove of humerus

action: adduction, horizontal adduction and medial (internal) rotation of arm

innervation: medial and lateral pectoral

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Deltoid

origin

insertion

action

innervation

origin: lateral clavicle (anterior fibers), acromion (lateral fibers), spine of scpula (posterior fibers)

insertion: deltoid tuberosity of humerus

action: abduct shoulder

innervation: axillary

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Subscapularis:

origin

insertion

action

innervation

origin : sub scapular fossa

insertion: lesser tubercle of humerus

action: medial rotation of shoulder joint

innervation: subscapular

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Supraspinatus:

origin

insertion

action

innervation

origin: supraspinatous fossa

insertion: greater tubercle of humerus

action: abduction of shoulder joint

innervation: suprascapular

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Infraspinatus:

origin

insertion

action

innervation

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origin: infraspinatous fossa

insertion: greater tubercle of humerus

action: lateral rotation of shoulder joint

innervation: suprascapular

Teres Major:

origin

insertion

action

innervation

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origin: inferior lateral scapula

insertion: bicipital groove of humerus

action: medial rotation, adduction, extension

innervation: subscapular

Teres Minor:

origin

insertion

action

innervation

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origin: superior-lateral scapula

insertion: greater tubercle of humerus

action: lateral rotation of shoulder joint

innervation: axillary

Biceps Brachii:

origin

insertion

action

innervation

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origin: supraglenoid tubercle of scapula

insertion: radial tuberosity

action: flexion of arm

innervation: musculocutaneous

Triceps Brachii:

origin

insertion

action

innervation

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origin: infraglenoid tubercle of scapula

insertion: olecranon process of ulna

action: extension of arm and forearm

innervation: radial

Pronator teres:

origin

insertion

action

innervation

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origin: coronoid process of ulna and medial epicondyle of humerus

insertion: radius

action: pronation of forearm

innervation: median

Flexor carpi radialis:

origin

Insertion

action

innervation

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origin: medial epicondyle of humerus

insertion: base of 2 and 3 metacarpals

action: flex and abduct (radial deviate) hand

innervation: median

Flexor Carpi ulnaris:

origin

insertion

action

innervation

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origin: medial epicondyle of humerus and olecranon of ulna

insertion: base of 5 metacarpal, pisiform and hook of hamate

action: flex and adduct (ulnar deviation) of hand

innervation: ulnar

Flexor digitorum superficialis:

origin

insertion

action

innervation

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origin : medial epicondyle of humerus, coronoid process of ulna and radius

insertion: base of middle phalanges of 2-5

action: flex hand and fingers and MCP + PIP joints

innervation: median

Extensor carpi radialis longus: origin insertion action innervation

origin: lateral supracondylar ridge of humerus insertion: base of 2nd metacarpal action: extend and radial deviate (abduct) wrist innervation: radial

brachioradialis

origin: lateral supracondylar ridge of humerus insertion: styloid process of radius action: flex forearm in mid pronation innervation: radial

extensor digitorum

origin: lateral epicondyle of humerus insertion: distal and middle phalanges of 2-5 action: extend wrist, extend fingers at MCP, PIP and DIP innervation: radial

abductor pollicis longus

origin : middle of radius and ulna; interosseous membrane insertion: base of 1st metacarpal action: abduct and extend thumb at CMC joint innervation: radial

abductor pollicis brevis

origin: scaphoid, trapezium and flexor retinaculum insertion: lateral base of proximal phalanx of thumb action: abduction of thumb innervation: median

flexor pollicis brevis

origin: trapezium and flexor retinaculum insertion: lateral base of proximal phalanx of thumb action: flexion of thumb innervation: median

dorsal interossei

origin: adjacent sides of metacarpals insertion: #1: lateral index finger #2: lateral middle finger #3: medial middle finger #4: medial ring finger action: abduction (and flexion and extension) of fingers 2, 3, 4 innervation: ulnar

Tensor Fascia Lata:

origin: lateral ASIS and anterior part of iliac crest insertion: tibia (gerdy's tubercle) action: flex, abduct, medial rotate thigh (hip joint) innervation: superior gluteal

sartorius

origin : ASIS insertion: proximal medial shaft of tibia (forms per anserine tendon) action: flex hip and knee innervation: femoral

biceps femoris

origin long head: ischial tuberosity short head: linear aspera insertion -head of fibula -lateral condyle of tibia action -hip extension and knee flexion innervation -tibia and common fibular

semitendinous

origin; ischial tuberosity insertion; proximal and medial shaft of tibia action; hip extension and knee flexion innervation: tibial

rectus femoris

origin ; AIIS and groove above brim of acetabulum insertion: base of patella and tibial tuberosity action: extend leg (knee joint), flex thigh (hip joint) innervation: femoral

vastus medialis

origin : anterior and lateral femur insertion: base of patella and tibial tuberosity action: extension of leg (knee joint) innervation: femoral

adductor muscles (as a group)

origin : pubic ramus and ischium insertion: linear aspera of femur action: adduction of hip innervation: obturator nerve (except pectinous - femoral nerve)

gastrocnemius

origin -medial head; medial condyles of femur -lateral head; lateral condyles of femur insertion; calcaneus via calcanea (achilles) tendon action; planter flexion of foot (ankle joint), flexion of leg (at knee joint) innervation; tibial

muscles Flashcards

(39 cards)