Actions, origins, insertions Flashcards
Sternocleidomastoid
action: flexes and laterally rotates head
origin: manubrium of sternum and medial clavicle
insertion: mastoid process
Scalenes - anterior, middle, posterior
action: elevates first two ribs for inspiration
Levator scapulae
action: elevates scapula
Zygomaticus minor
action: major and minor combine to raise lateral corners of mouth
Masseter
actions: elevates mandible
Temporalis
actions: elevates mandible
Splenius wapitis
action: extends/hyperextends neck
Trapezius
actions: extends and laterally flexes head
Latissimus dorsi.
action: arm extension, arm adduction, medially rotates arm
Rhomboideus minor
action: major and minor combine to retract and fixate scapula
Erector spinae
action: extends vertebrae
Pectoralis major
actions: flexes and medially rotates arm
External intercostals
action: elevate rib cage during inspiration
Internal intercostals
actions: depress rib cage during forced expiration
Rectus abdominis
actions: flexes vertebrae and compresses abdomen
Supraspinatus
action: abducts arm
origin: supraspinous fossa of scapula
insertion: greater tubercle of humerus
Infraspinatus
actions: laterally rotates arm
origin: infraspinous fossa of scapula
insertion: greater tubercle of humerus
Teres minor
action: laterally rotates arm
origin: lateral border of scapula
insertion: greater tubercle of humerus
Subscapularis
action: medially rotates arm
origin: sub scapular fossa of scapula
insertion: lesser tubercle of humerus
triceps brachii
action: extends forearm
origin: scapula and humerus
insertion: olecranon process
biceps brachii
action: flexes and supinates forearm
origin: coracoids process of scapula and humerus
insertion: radial tuberosity
brachialis
action: flexes forearm
coracobrachialis
action: flexes and adducts the arm
origin: coracoid process of scapula
insertion: shaft of humerus
printer teres
action: pronates forearm
origin: medial epicondyle of humerus
insertion: radius shaft
flexor carpi radialis
action: flexes and abducts wrist
origin: medial epicondyle of humerus
insertion: metacarpals 2-3
palmaris longus
action: flexes wrist
origin: medial epicondyle of humerus
insertion: fascia of palm
flexor carpi ulnaris
action: flexes and adductions wrist
origin: medial epicondyle of humerus
insertion: metacarpal 5
flexor digitorum superficialis
action: flexes wrist and fingers
origin: medial epicondyle of humerus
insertion: middle phalanges
flexor pollicis longus
action: flexes thumb
flexor digitorum profundus
action: flexes fingers
brachioradialis
action: flexes forearm
extensor carpi radialis longs and brevis
action: extends and abducts wrist
origin: lateral epicondyle of humerus
insertion: metacarpal 3
extensor digitorum
action: extends wrist and fingers
origin: lateral epicondyle of humerus
insertion: distal phalanges
extensor digiti minimi
action: extends wrist and little finger
extensor carpi ulnaris
action: extends and adducts wrist
origin: lateral epicondyle of humerus
insertion: metacarpal 5
supinator
action: supinates forearm
origin: lateral epicondyle of humerus
insertion: radius shaft
abductor pollicis longus
action: abducts and extends thumb
extensor pollicis brevis
action: extends thumb
illiopsoas
action: flexes thigh
sartorius
action: flexes, abducts and laterally rotates thigh, flexes and medially rotates leg
origin: anterior superior iliac spine
insertion: medial tibia
Quadriceps group
action: flexes thigh and extends leg
Rectus femoris
origin: anterior inferior iliac spine
insertion: tibial tuberosity via patellar ligament
adductor group
action: adducts and medially rotates thigh
gluteus maximus
action: extends and laterally rotates thigh
piriformis
action: laterally rotates extended thigh; abducts flexed thigh
hamstrings group
action: extends thigh and flexes leg
tibialis anterior
action: dorsiflexes and inverts foot
extensor digitorum
action: extends toes
gastrocnemius
action: plantar flexes foot
origin: medial and lateral condyles of femur
insertion: calcaneus via achilles tendon
plantaris
action: plantar flexes foot
soleus
action: plantar flexes foot
flexor digitorum longus
action: flexes toes
flexor hallucis longus
action: flexes big toe
