Muscle Orgin/Insertion Flashcards
sternocleidomastoid
O: Manubrium of sternum, clavicle
I: Mastoid process of temporary bone
A: Flexion, rotation of the head at the neck
deltoid
O: Acromion process & spine of scapula, clavicle
I: Deltoid tuberosity of humerus
A: Abduct, flex & medially rotate, extend & laterally rotate arm at shoulder
pectoralis major
O: Sternum, clavicle, costal cartilages
I: Crest of greater tubercle of humerus
A: Adduct, medially rotates, flexes arm at shoulder, elevates ribs
teres major
O: Inferior Angle of scapula
I: Lesser tubercle of humerus
A: Adducts, extends & medially rotates arm at shoulder
infraspinatus
O: Infraspinous fossa of scapula
I: Greater tubercle of humerus
A: lateral rotation of scapula at shoulder
tibialis anterior
O: Proximal tibia
I: 1st Metatarsal & medial cuneiform bone
A: Inverts & dorsiflexes foot at ankle
gastrocnemius
O: medial and lateral condyles of femur
I: Calcaneus by way of calcanea tendon
A: Plantar flexes foot at ankle
rectus femoris
O: anterior inferior iliac spine
I: base of patella & tibial tuberosity of tibia by way of patellar ligament
A: Extends knee, flexes thigh at hip
sartorius
O: Anterior superior iliac spine
I: proximal medial surface of tibia
A: Flexes, abducts & laterally rotates thigh at hip, flexes
biceps femoris
O: ischial tuberosity of ischium
I: Head of fibula
A: Extends & laterally rotates at hip, flexes at knee
semimembranosus
O: Ischial tuberosity of ischium
I: Medial condyle of tibia
A: Extends & medially rotates at hip, flexes at knee
semitendonosus
O: Ischial tuberosity of ischium
I: Proximal surface of tibia
A: extends & medially rotates at hip, flexes at knee
Quadriceps femoris muscle group
vastus lateralis
vastus medialis
vastus intermedius
rectus femoris
Hamstring Muscle group
biceps femoris
semimembranosus
semitendinosus
Rotator Cuff Muscle Group
subscapularis
supraspinatus
infraspinatus
teres minor
