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M U S C L E S
Lab 8
Due in Lab 10
� 2 weeks because of Thanksgiving
� Prelab #10
� Both sides!
� Homework #8
� Both sides!
Refer to Muscles 22-23
� Naming of muscles
� Origin
� Site of muscle attachment that doesn’t move during action
� Usually proximal
� Insertion
� Site of muscle attachment that moves during action
� Usually distal
Examples of Origin & Insertion
Muscle Origin Insertion
Temporalis Temporal fossa of the temporal bone
Coronoid process of mandible
Deltoid Lateral third of clavicle, acromion,
and spine of scapula
Deltoid tuberosity of humerus
Biceps brachii Short head-coracoidprocess of scapula.
Long head-superior portion of glenoid
fossa of scapula
By common tendoninto radial tuberosity
of radius and proximal ulna
Part 1
Muscles of the head, neck, torso & arm.
Orbicularis oculi
Buccinator
Orbicularis oris
Mentalis
Platysma
Frontalis
Temporalis
Masseter
Sternocleidomastoid
Trapezius
Zygomaticus
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TemporalisElevates &
retracts mandible
Masseter = Prime mover of
jaw closure
Subclavius
Clavicle
Subscapularis
Pectoralis minor
Coracobrachialis
Serratus anterior
Humerus
Sternocleido-mastoid
Deltoid
Pectoralismajor Sternum
Biceps brachii
Trapezius
Levatorscapulae
Supraspinatus
Clavicle
Spine ofscapula
InfraspinatusTeres minor
Humerus
Deltoid
Teres major
Latissimusdorsi
RhomboidminorRhomboidmajor
Clavicle
Deltoid
Sternum
Pectoralis major
Lateral headLong head
Medial head
Coracobrachialis
Triceps brachii:
Biceps brachii
Brachialis
Brachioradialis
Anterior view
Supraspinatus*Spine of scapula
Posterior view
Deltoid (cut)
Greater tubercleof humerusInfraspinatus*
Teres minor*
Teres major
Triceps brachii:
Latissimus dorsi
Humerus
Olecranon processof ulna
Lateral headLong head
Anconeus
* Rotator cuff muscles
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Biceps brachii
Tendon of biceps brachii
Pronator teres
Brachioradialis
Extensor carpi radialis longus
Flexor pollicis longus
Pronator quadratus
Flexor retinaculum
Medial head oftriceps brachii
Medial epicondyleof humerus
Flexor carpi radialis
Palmar aponeurosis
Superficial transverseligament of palm
Palmaris longus
Flexor carpi ulnaris
Flexor digitorumsuperficialis
Extensor digitorum
Abdomen
External oblique
Rectus abdominisInternal obliqueTransversus abdominis
Part 2
Muscles of the thigh and leg
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Gluteus medius
Gluteus maximus
Adductor magnus
Gracilis
Iliotibial tract
Long head
SemitendinosusSemimembranosus
Short headBiceps
femorisHamstrings
Psoas minor
Iliac crestPsoas major
Iliopsoas
12th rib
Quadratus lumborum
Iliacus
Anterior superior iliac spine
Tensor fasciae latae
Pectineus
Sartorius
Quadriceps femoris
• Rectus femoris
• Vastus lateralis
• Vastus medialis
Adductor magnus
PatellaPatellar ligament
Tendon of quadriceps femoris
12th thoracic vertebra
5th lumbar vertebra
Adductor longus
Gracilis
Gastrocnemius
Plantaris
Medial headLateral head
Tendon ofgastrocnemius
Calcaneal tendon
Medial malleolus Lateral malleolus
Calcaneus
Superficial view of the posterior leg
Gastrocnemiusmedial head (cut)
Flexor digitorumlongus
Tendon of tibialisposterior
Medial malleolus
Calcaneal tendon (cut)Calcaneus
Fibularis brevis
Flexor hallucis longus
Fibularis longus
Fibula
Tibialis posterior
Soleus (cut)
Popliteus
Gastrocnemiuslateral head (cut)
Plantaris (cut)
Deep muscles of the posterior compartment
Fibularis longus
Gastrocnemius
Tibia
Tibialis anterior
Extensor digitorum longus
Soleus
Extensor hallucis longus
Fibularis tertius
Extensor hallucis brevis
Extensor digitorum brevis
Superior and inferiorextensor retinacula
Patella
Head of fibula
GastrocnemiusSoleusFibularis longus
Extensor digitorum longus
Tibialis anterior
Extensor hallucis longus
Fibularis tertius
Fibularis brevis
Flexor hallucis longus
Fibular retinaculum
Lateral malleolus
Superior and inferior extensorretinacula
Extensor digitorum brevis
5th metatarsal
Extensor hallucis brevis
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Shoulder
Arm
Forearm
Thigh
Leg
Head Facial
Neck
Thorax
Abdomen
Thigh
Leg
TrapeziusDeltoid
Triceps brachiiBiceps brachiiBrachialis
BrachioradialisFlexor carpi radialisPalmaris longus
Rectus femorisVastus lateralisVastus medialis
Extensor digitorum longusTibialis anterior
Temporalis Frontalis (frontal belly of epicranius)Orbicularis
oculi
Orbicularis oris
Sternocleidomastoid
Pectoralis majorSerratus anterior
External oblique
Rectus abdominisInternal obliqueTransversus abdominis
SartoriusTensor fasciae latae
Adductor longusGracilis
Gastrocnemius
Soleus
Masseter
Platysma
Arm
Triceps brachiiBrachialisForearm
Brachioradialis
Extensor digitorum
Iliotibial tract
Leg
Gastrocnemius
Soleus
Neck
Epicranius, occipital bellySternocleidomastoidTrapezius
Shoulder
Hip
Gluteus mediusGluteus maximus
Thigh
Biceps femoris
Adductor magnus
SemitendinosusSemimembranosus
Latissimus dorsiRhomboid major
InfraspinatusDeltoid
Teres major
Calcaneal(Achilles) tendon
Hamstrings:
