Muscles II Flashcards
Supination definition
Rotation outwards
Pronation definition
Rotation inwards
Abduction definition
Movement away from midline
Adduction definition
Movement towards midline
Muscles of the scapula
Supraspinatus
Infraspinatus
Teres minor
Teres major
Subscapularis
Muscles of the ulna
Brachialis
Triceps brachii
Muscles of the humerus
Deltoid muscle
Muscles of the radius
Biceps brachii
Muscles of the innominate
Iliacus
Gluteus maximus
Gluteus medius
Gluteus minimus
Muscles of the femur
Piriformis
Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius
Origin, insertion and function of supraspinatus
Origin: supraspinous fossa of scapula
Insertion: superior facet of greater tubercle
Function: abducts arm at shoulder joint
Origin, insertion and function of infraspinatus
Origin: infraspinous fossa of scapula
Insertion: posterior facet of greater tubercle
Function: laterally rotates arm at shoulder joint
Origin, insertion and function of teres minor
Origin: inferior lateral border of scapula
Insertion: Inferior aspect of greater tubercle
Function: Laterally rotates arm at shoulder joint and extends arm at shoulder joint
Origin, insertion and function of teres major
Origin: lower lateral border and inferior angle of scapula
Insertion: medial lip of intertubercular (bicipital) groove of the anterior humerus
Function: Adducts and extends arm at shoulder joint and medially rotates arm at shoulder joint
Origin, insertion and function of subscapularis
Origin: subscapular fossa of scapula
Insertion: Lesser tubercle
Function: Medially rotates arm at shoulder joint
Origin, insertion and function of brachialis
Origin: anterior, distal half of humerus
Insertion: coronoid process and tuberosity of ulna
Function: Flexes forearm at elbow
Origin, insertion and function of triceps brachii
Origin: long head is infraglenoid tubercle; lateral head is above radial groove; medial head is below radial groove
Insertion: posterior olecranon process
Function: extension of forearm and shoulder, long head extends and adducts arm
Origin, insertion and function of deltoid
Origin: anterior border and superior aspect of the lateral third of the clavicle, acromion and spine of the scapula
Insertion: deltoid tuberosity of humerus
Function: extends, flexes and abducts shoulder
Origin, insertion and function of biceps brachii
Origin: long head at supraglenoid tubercle and short head at coracoid process
Insertion: radial tuberosity and bicipital aponeurosis
Function: flexes forearm at elbow joint, flexes arm at shoulder joint and supinates forearm at radioulnar joint
Origin, insertion and function of iliacus
Origin: iliac fossa and sacrum
Insertion: lesser trochanter
Function: flexes and rotates thigh at hip and flexes trunk at pelvis when origin and insertion are reversed
Origin, insertion and function of gluteus maximus
Origin: iliac crest, sacrum, coccyx and aponeurosis of sacrospinalis
Insertion: gluteal tuberosity and iliotibial tract
Function: extends and laterally rotates thigh at hip (upper fibres help abduct thigh)
Origin, insertion and function of gluteus medius
Origin: ilium
Insertion: greater trochanter
Function: abducts thighs at hip joint and medially rotates thigh
Origin, insertion and function of gluteus minimus
Origin: ilium
Insertion: greater trochanter
Function: abducts thigh at hip joint and medially rotates thigh
Origin, insertion and function of piriformis
Origin: sacrum
Insertion: superior border of greater trochanter
Function: laterally rotates thigh at hip bone
Origin, insertion and function of rectus femoris
Origin: anterior inferior iliac spine
Insertion: patella via quadriceps tendon and then tibial tuberosity via patellar ligament
Function: extends leg at knee, flexes thigh at hip joint
Origin, insertion and function of vastus lateralis
Origin: greater trochanter, linea aspera of femur
Insertion: patella via quadriceps tendon and then tibial tuberosity via patellar ligament
Function: extends leg at knee
Origin, insertion and function of vastus medialis
Origin: linea aspera of femur
Insertion: patella via quadriceps tendon and then tibial tuberosity via patellar ligament
Function: extends leg at knee
Origin, insertion and function of vastus intermedius
Origin: anterior and lateral surfaces of body of femur
Insertion: patella via quadriceps tendon and then tibial tuberosity via patellar ligament
Function: extends leg at knee