Muscles that act on the arm
Deltoid
+ is it intrinsic or extrinsic?
O- clavicle, acromion process, and spine of spacula
I- deltoid tuberosity of humerus
A- extend, flex, and abduct arm
extrinsic
Coracobrachialis
Brachialis
Brachioradialis
adducts arm and flexes shoulder
flexes elbow
flexes elbow
Iliopsoas
action + name two parts
Iliacus and posts major
flexes hip
Sartorius
O - (anterior superior) Iliac spine
I - medial surface @ tibial tuberosity
A - lateral rotation of femur, flexes knee + hip
Gastrocnemius (medial head)
O - near medial epicondyle of femur
I - calcaneus
A - plantar flexes foot, flexes knee
Pectoralis major
+intrinsic or extrinsic?
O- clavicle, sternum, and cartilages of lower ribs
I- just distal of greater tubercle of humerus
A- flex, adduct, and medially rotate humerus
extrinsic
Biceps brachii
+how many heads
are they biarticular
O - (long head) - upper lip of glenoid cavity (scapula)
O - (short head) - tip of coracoid process (scapula)
I - radial tuberosity of radius
A (@ elbow) - flex elbow & supinate forearm
A (@ shoulder) - flexes shoulder/arm
2, both are biarticular
Tensor fasciae latae
O - Iliac crest, anterior superior iliac spine
I - Iliotibial tract (aka Iliotibial band, fascia latae)
A - flexes and abducts hip, medially rotates femur
Long head biceps femoris
O - ischial tuberosity
I - head of fibula
A - extends hip, flexes knee
Gastrocnemius and Plantaris
O - near lateral epicondyle of femur
I - calcaneus
A – plantar-flexes foot, flexes knee
Latissmus dorsi
+intrinsic or extrinsic?
O- spinous processes of thoracic/lumbar vertebrae, iliac creat
I- inter tubercular groove below lesser tubercle of humerus
A- extends, adducts, and medially rotates arm
extrinsic
Triceps brachii
+how many heads
are they biarticular?
O - (long head) - lower lip of glenoid cavity (scapula)
O - (lateral head) - lateral surface of humerus
O - (medial head) - medial surface of humerus
I - olecranon process of ulna
A (@ elbow) - extends elbow
A (@ shoulder) - extends shoulder/arm
3 heads, and one is biarticular
Adductors
(name the three) +OIA
magnus, longus, brevis
O’s - extend from ischial tuberosity forward to pubis
I - linea aspera
A - adduct (also medial & lateral rotation of) femur
Semimembranosus & Semitendinosus
O - ischial tuberosity
I - medial surface @ proximal end of tibia
A - extends hip, flexes knee
Soleus
O - posterior surface of proximal tibia & fibula I - calcaneus
A - plantar flexes foot
Supraspinatus
Infraspinatus
O- supraspinous fossa of scapula
I- greater tubercle of humerus
A- abduct arm
O- infraspinous fossa of scapula
I- greater tubercle of humerus
A- lateral rotation of arm
Flexors (anterior side)
name the 5 muscles
Flexor carpi radialis
Flexor carpi ulnaris
Palmaris longus
Flexor digitorum
Flexor pollicis
BONUS- can you guys name the actions for these muscles?
Gracilis
O - pubic bone
I - medial surface @ tibial tuberosity
A - adducts & medially rotates femur
Quadriceps femoris
Vastus (name the tree muscles +OIA)
O - linea aspera
I - tibial tuberosity
A - extends knee
Tibialis anterior
O – proximal shaft of tibia
I – ventral/medial surface of 1st metatarsal
A – dorsi-flexes and inverts the foot
Teres minor
Subscapularis
Teres major
O- lateral border of scapula
I- greater tubercle of humerus
A- lateral rotation of arm
O- sub scapular fossa of scapula
I- lesser tubercle of humerus
A- medial rotation of arm
O- lateral border of scapula
I- near lesser tubercle of humerus
A- medial rotation of arm
Extensors (posterior side)
4 muscles
Extensor carpi radialis
Extensor carpi ulnaris
digitorum
Extensor pollicis
BONUS- can you guys name the actions of these muscles?
Gluteus
name the three muscles+ OIAs
G. maximus
O - iliac crest, sacrum
I - iliotibial tract, gluteal tuberosity
A - extends and abducts hip, laterally rotates femur
G. medius & minimus
O - Iliac crest
I - greater trochanter
A - abducts femur
Quadriceps femoris
Rectus femoris
O - (anterior inferior) iliac spine
I - tibial tuberosity
A - extends knee, flexes hip
Extensor digitorum
Flexor digitorum
O - proximal shaft of fibula
I - dorsal surface of phalanges
A - extends digits
O - proximal shaft of tibia
I - ventral surface of phalanges
A - flexes digits