+
MUSCLES OF
THE HUMAN
BODY
+ VOCABULARY TERMS
SUPERIOR ANTERIOR
Nearer to the head Nearer to the front
INFERIOR POSTERIOR
Nearer to the feet Nearer to the back
+ VOCABULARY TERMS
SUPERFICIAL MEDIAL
Nearer to the Nearer to the
surface of the body median plane
DEEP LATERAL
Farther from the Farther from the
surface of the body median plane
+ Muscles of the Arm
+ Anterior Compartment
Biceps Brachii Biceps Brachii
Has two heads
Attaches
proximally to scapula
distally to proximal part of
ulna
movements of the arm:
flexor of the elbow joint
supinator of the forearm
+ Anterior Compartment Cont’d
Brachialis Brachialis
Brachioradialis
Attaches
proximally to the anterior surface
of the humerus
distally to the coronoid process of
the ulna
movements of the arm
powerful flexor of the elbow joint
it works along with the biceps
brachii.
Brachioradialis
Use this muscle when shaking hands
+ Posterior Compartment Triceps
Triceps Brachii
Has three heads
Attaches
Proximally to humerus
(medial and lateral head)
Distally to the olecranon
process of the ulna
Movement of the arm:
elbow extensor
Brachioradialis
+
Muscles of the Forearm
+
forearm muscles act on the elbow, wrist and digits
(fingers)
flexor-pronator group
attached to the medial epicondyle of the
humerus
extensor-supinator
attached to the lateral epicondyle of the humerus
+
Flexors of the forearm
Anterior View Extensors of the forearm
Posterior View
+Muscles of the Pelvic
Girdle
+ Anterior Muscles
Psoas Major Sacrum Iliopsoas Muscle
Iliacus
A combination of two
other muscles
Psoas Major
Iliacus
Primary flexor of the
hip
Allows you to bring your
thighs up to your chest or
your chest to your knees
+ Posterior and Lateral Muscles
gluteals Gluteus
Medius
include 3 muscles:
Gluteus
Gluteus maximus Maximus
Most superficial
the largest of the three
muscles
principal extensor of the
hip
Gluteus medius and minimus
assist it in hip extension
abduct the hip
+
Thigh Muscles
+ Medial Compartment
Pectineus Pectineus
Adductor Brevis
Gracilis Adductor Longus
Adductor Magnus
Adductors:
Gracilis
adductor longus
adductor brevis
adductor magnus
Primary action -
adduct the thigh
towards the midline
+ Anterior Compartment
Quadriceps Rectus Femoris
Sartorius
Rectus femoris
Vastus lateralis Vastus Lateralis
Vastus intermedius Vastus Intermedius
Vastus medialis.
Extend the knee Vastus Medialis
Sartorius
Lies anterior to the quads
Use to sit cross-legged or
limbo
+ Posterior Compartment
Hamstrings Long Head of
Biceps Femoris
biceps femoris
Semitendinosus Short Head of
Semimembranosus Biceps Femoris
Semitendinosis
Attach
Semimembranosis
proximally to the ischial tuberosity
distally, biceps femoris to the head
of the fibula and the
semitendinosus and
semimembranosus to the tibia.
flex the knee
also extend at the hip
+
Leg Muscles
+ Anterior Compartment
tibialis anterior
extensor hallucis longus (deep)
extensor digitorum (deep)
arise from
– anterolateral surface of the tibia
– interosseous membrane between the tibia and the fibula
– anterior surface of the fibula
cross anterior to the ankle joint
attach distally to
– medial side of the foot
– distal phalanges of the digits
movements:
– primarily dorsi-flexors of the ankle
– extensors of the toes
– Tibialis anterior further inverts the foot
– Peroneus tertius assist in eversion