Muscle Practical 2 Flashcards
Triceps brachii
Origin: Infraglenoid tubercle, proximal humerus, posterior humerus
Insertion: olecranon process
Action: extends forearm
Biceps brachii
Origin: Supraglenoid tubercle, coracoid process
Insertion: radial tuberosity
Action: flexes and supinates forearm
Brachioradialis
Origin: distal humerus
Insertion: styloid process of radius
Action: flexes forearm
Brachialis
Origin: distal anterior humerus
Insertion: coronoid process of ulna
Action: flexes forearm
Flexor carpi radialis
Origin: Medial epicondyle of humerus
Insertion: Second and third metacarpals
Action: Flexes and abducts hand
Flexor carpi ulnaris
Origin: Medial epicondyle of humerus
Insertion: Medial carpals and fifth metacarpal
Action: Flexes and adducts hand
Extensor carpi radialis longus
Origin: Lateral distal humerus
Insertion: Second metacarpal
Action: Extends and abducts hand
Extensor carpi ulnaris
Origin: Lateral epicondyle of humerus
Insertion: Fifth metacarpal
Action: Extends and adducts hand
Psoas major
Origin: Transverse processes and bodies of lumbar vertebrae
Insertion: Lesser trochanter
Action: Flexes thigh
Iliacus
Origin: Iliac fossa
Insertion: Lesser trochanter
Action: Flexes thigh
Sartorius
Origin: Anterior superior iliac spine
Insertion: Medial condyle of the tibia
Action: Flexes, abducts and laterally rotates thigh; flexes leg
Tensor fasciae latae
Origin: Iliac crest and anterior superior iliac spine
Insertion: Iliotibial tract
Action: Flexes, abducts and medially rotates thigh
Gracilis
Origin: Body and inferior ramus of pubis
Insertion: Medial surface of proximal tibia
Action: Adducts thigh; flexes leg
Rectus femoris
Origin: Anterior inferior iliac spine
Insertion: Tibial tuberosity via patellar ligament
Action: Flexes thigh; extends leg
Vastus lateralis
Origin: Greater trochanter, proximal linea aspera
Insertion: Tibial tuberosity via patellar ligament
Action: Extends leg
Vastus medialis
Origin: Linea aspera and medial femur
Insertion: Tibial tuberosity via patellar ligament
Action: Extends leg
Vastus intermedius
Origin: Anterior and lateral proximal femur
Insertion: Tibial tuberosity via patellar ligament
Action: Extends leg
Gluteus maximus
Origin: Posterior ilium, sacrum, and coccyx
Insertion: Gluteal tuberosity
Action: Extends, abducts and laterally rotates thigh
Gluteus medius
Origin: Posterior surface of ilium
Insertion: Greater trochanter
Action: Abducts and medially rotates thigh
Biceps femoris
Origin: ischial tuberosity, posterior femur
Insertion: Head of fibula and lateral condyle of tibia
Action: Extends thigh; flexes leg
Semitendinosus
Origin: Ischial tuberosity
Insertion: Proximal medial tibia
Action: Extends thigh; flexes leg
Semimembranosus
Origin: Ischial tuberosity
Insertion: Posterior medial condyle of tibia
Action: extends thigh; flexes leg
Tibialis anterior
Origin: Lateral condyle and proximal tibia
Insertion: Medial tarsal and first metatarsal
Action: Dorsiflexes and inverts foot
Fibularis (peroneus) longus
Origin: Proximal lateral fibula
Insertion: Medial tarsal and first metatarsal
Action: Plantar flexes and everts foot
Gastrocnemius
Origin: Femoral condyles
Insertion: Calcaneous
Action: Flexes leg and plantar flexes foot
Soleus
Origin: Head of fibula, proximal tibia
Insertion: Calcaneous
Action: Plantar flexes foot
