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Appendicular Muscles
Origins, Insertions, and Actions of muscles I need to know for my A&P lab
101
Biology
Undergraduate 2
10/16/2012

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Term
Biceps Brachii (Origin)
Definition
Corocoid process, the second head runs through the intertubular sulcus to insert within capsule of shoulder joint
Term
Biceps Brachii (Insertion)
Definition
Radial tuberosity
Term
Biceps Brachii (Action
Definition
Flexion of Elbow, supination of forearm
Term
Brachialis (Origin)
Definition
Distal portion of anterior humerus
Term
Brachialis (insertion)
Definition
coronoid process of ulna
Term
Brachialis (Action)
Definition
flexion of forearm
Term
brachioradialis (origin)
Definition
lateral ridge at distal end of humerus
Term
Brachioradialis (insertion)
Definition
styloid process of radius
Term
Brachioradialis (action)
Definition
synergist of forearm flexion
Term
Triceps Brachii (origin)
Definition
1. Long head: inferior margin of glenoid cavity. 2. Lateral Head: posterior humerus. 3. Medial head: distal radial groove on posterior humerus.
Term
Triceps Brachii (insertion)
Definition
olecrenon process of ulna
Term
Triceps brachii (action)
Definition
forearm extensor
Term
Flexor Carpi Radialis (origin)
Definition
medial epicondyle of humerus
Term
Flexor Carpi Radialis (insertion)
Definition
base of metacarpals 2+3
Term
Flexor Carpi Radialis (action)
Definition
powerful flexor of wrist, abducts hands
Term
Flexor Carpi Ulnaris (origin)
Definition
medial epicondyle of humerus + olecrenon process + posterior surface of ulna
Term
Flexor Carpi Ulnaris (insertion)
Definition
base of metacarpal 5, pisiform + hamate
Term
Flexor Carpi Ulnaris (action)
Definition
powerful flexor of wrist, adducts hands
Term
Pronater Teres (origin)
Definition
meial epicondyle of humerus + coronoid process of ulna
Term
Pronater Teres ( insertion)
Definition
midshaft of radius
Term
Pronater Teres (action)
Definition
pronates forearm, weak elbow flexor
Term
Flexor Digitorum Superficialis (origin)
Definition
Medial epicondyle of Humerus, coronoid process of ulna, shaft of radius
Term
Flexor Digitorum Superficialis (insertion)
Definition
middle phalanges of fingers 2-5
Term
Flexor Digitorum Superficialis (action)
Definition
Flexes wrist and middle phalanges 2-5
Term
Extensor Carpi Ulnaris (origin)
Definition
lateral epicondyle of humerus, posterior border of ulna
Term
Extensor Carpi Ulnaris (insertion)
Definition
Base of metacarpal 5
Term
Extensor Carpi Ulnaris (action)
Definition
extends and adducts wrist
Term
Extensor Carpi Radialis Longus (origin)
Definition
lateral supracondylar ridge of humerus
Term
Extensor Carpi Radialis Longus (insertion)
Definition
base of metacarpal 2
Term
Extensor Carpi Radialis Longus (action)
Definition
extends and abducts wrist
Term
Extensor Carpi Radialis Brevis (origin)
Definition
lateral epicondyle of humerus
Term
Extensor Carpi Radialis Brevis (insertion)
Definition
base of metacarpal 3
Term
Extensor Carpi Radialis Brevis (action)
Definition
extends and abducts wrist
Term
extensor digitorum (origin)
Definition
lateral epicondyle of humerus
Term
extensor digitorum (insertion)
Definition
by four tendons into distal phalanges 2-5
Term
extensor digitorum (action)
Definition
prime mover of finger extension
Term
Gluteus Maximus (origin)
Definition
dorsal ilium, sacrum, and coccyx
Term
Gluteus Maximus (insertion)
Definition
gluteal tuberosity of femur and IT tract
Term
Gluteus Maximus (action)
Definition
thigh extensor
Term
Gluteus Medius (origin)
Definition
upper lateral surface of ilium
Term
Gluteus Medius (insertion)
Definition
greater trochanter of femur
Term
Gluteus Medius (action)
Definition
abducts and medially rotates thigh
Term
Gluteus minimus (origin)
Definition
external inferior surface of ilium
Term
Gluteus minimus (insertion)
Definition
greater trochanter of femur
Term
Gluteus minimus (action)
Definition
abducts and medially rotates thigh
Term
tensor fascia latae (origin)
Definition
anterior aspect of iliac crest and anterior superior iliac spine
Term
tensor fascia latae (insertion)
Definition
IT tract
Term
tensor fascia latae (action)
Definition
steadies trunk
Term
gracilis (origin)
Definition
inferior ramus and body of pubis
Term
gracilis (insertion)
Definition
medial surface of tibia, just inferior to medial condyle
Term
gracilis (action)
Definition
adducts thigh, flexes and rotates leg
Term
psoas major (origin)
Definition
transverse processes, bodies, and discs of T12 and lumbar vert.
Term
psoas major (insertion)
Definition
on and just below lesser trochanter of femur
Term
psoas major (action)
Definition
flexes trunk on thigh, flexes thigh, lateral flexion of vertebral column.
Term
illiacus (origin)
Definition
iliac fossa and crest, lateral sacrum
Term
illiacus (insertion)
Definition
on and just below lesser trochanter of femur
Term
illiacus (action)
Definition
flexes trunk on thigh, flexes thigh, lateral flexion of vertebral column.
Term
Sartorius (origin)
Definition
anterior superior iliac spine
Term
Sartorius (insertion)
Definition
by aponeurosis into medial aspect of proximal tibia
Term
Sartorius (action)
Definition
flexes, adducts, and L rotates thigh, flexes knee.
Term
Adductor Longus (origin)
Definition
pubis near symphysis
Term
Adductor Longus (insertion)
Definition
linea aspera
Term
Adductor Longus (action)
Definition
Adduct and medially rotates thigh, + flex
Term
Adductor Magnus (origin)
Definition
ischial + pubic rami and ischial tuberosity
Term
Adductor Magnus (insertion)
Definition
linea aspera + adductor tubercle of femur
Term
Adductor Magnus (action)
Definition
Adduct and medially rotates thigh, + flex
Term
Adductor Brevis (origin)
Definition
body and inferior ramus of pubis
Term
Adductor Brevis (insertion)
Definition
Linea Aspera
Term
Adductor Brevis (action)
Definition
Adduct and medially rotates thigh, + flex
Term
Vastus Medialis (origin)
Definition
linea aspera and intertrochanteric line
Term
Vastus Medialis (insertion)
Definition
tibial tuberosity + patella
Term
Vastus Medialis (action)
Definition
extends knee, stabilizes patella
Term
Vastus Lateralis (origin)
Definition
greater trochanter, intertrochanteric line, and linea aspera
Term
Vastus Lateralis (insertion)
Definition
tibial tuberosity and patella
Term
Vastus Lateralis (action)
Definition
extends and stabilizes knee
Term
Vastus Intermedius (origin)
Definition
anterior and lateral surface of femur
Term
Vastus Intermedius (insertion)
Definition
tibial tuberosity and patella
Term
rectus femoris (origin)
Definition
anterior inferior iliac spine + superior margin of acetabulum
Term
rectus femoris (insertion)
Definition
tibial tuberosity and patella
Term
rectus femoris (action)
Definition
extends knee, flexes thigh at hip
Term
Semitendinosis (origin)
Definition
ischial tuberosity
Term
Semitendinosis (insertion)
Definition
medial aspect of upper tibial shaft
Term
Semitendinosis (action)
Definition
extends thigh, flexes knee
Term
Semimembranosis (origin)
Definition
ischial tuberosity
Term
Semimembranosis (insertion)
Definition
medial condyle at tibia, lateral condyle of femur
Term
Semimembranosis (action)
Definition
extends thigh, flexes knee
Term
Biceps Femoris (origin)
Definition
1. Long head: ischial tuberosity,
2. Short head: linea Aspera
Term
Biceps Femoris (insertion)
Definition
fibular collateral ligament of knee
Term
Biceps Femoris (action)
Definition
knee flexion
Term
Gastrocnemius (origin)
Definition
by two heads to Medial/Lateral condyles of femur
Term
Gastrocnemius (insertion)
Definition
calcaneus via calcaneal tendon
Term
Gastrocnemius (action)
Definition
plantar flexion, when knee is extended, fan flex knee when foot is dorsiflexed
Term
soleus (origin)
Definition
proximal portion of tibia and fibula, interosseus membrane
Term
soleus (insertion)
Definition
calcaneus via calcaneal tendon
Term
soleus (action)
Definition
plantar flexion
Term
tibialis anterior (origin)
Definition
lateral condyle and upper 2/3rds of tibia; interosseus membrane
Term
tibialis anterior (insertion)
Definition
1st cuneiform and metatarsal 1
Term
tibialis anterior (action)
Definition
prime mover of dorsiflexion
Term
tibialis posterior (origin)
Definition
superior portion of tibia + fibula + interosseus membrane
Term
tibialis posterior (insertion)
Definition
several tarsals + metatarsals 2-4
Term
tibialis posterior (action)
Definition
prime mover of foot inversion
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