Chapter 16 Flashcards
Trapezius
-shrugs the shoulder
Levator Scapulae
-elevates the scapula
Rhomboid Major and Minor
-adduct and elevate the scapula
Serratus Anterior
- holds the scapula against the thorax
- abducts
Pectoralis Major
- axial muscle
- flexes the arm
- adducts the arm across the chest
Pectoralis Minor
- stabilizes the scapula
- raises the ribs during forced inhalation
Latissimus Dorsi
- axial muscle
- extends the arm
- adducts the arm across the back
Deltoid
- abducts the arm
- flexes the arm
- extends the arm
Coracobrachialis
- adducts the arm
- medial rotation
Supraspinatus
-abducts the arm
Teres Minor
-lateral rotation
Teres Major
- extends the arm
- adducts
- medial rotation
Infraspinatus
-lateral rotation
Subscapularis
-medial rotation
What muscles in the arm are considered axial?
- pectoralis major
- latissimus dorsi
What muscles make up the rotator cuff?
- SITS
- supraspinatus
- infraspinatus
- teres minor
- subscapularis
Biceps Brachii
-flexes the forearm only when the forearm is supinated
Brachialis
-flexes the forearm
Brachioradialis
-flexes the forearm
Triceps Brachii
-extends the forearm
Anconeus
- extends the forearm
- barely does any work
Pronator Teres
-pronates the forearm
Pronator Quadratus
-pronates the forearm
Supinator
-supinates the forearm
What is an intrinsic muscle? Extrinsic?
- intrinsic: located in the hand
- extrinsic: located in the forearm; divided into flexors and extensors
What is a retinacula?
-strong fascial bands
What is the carpal tunnel?
-the tunnel formed by carpal bones and flexor retinaculum that many flexors pass through
What is carpal tunnel syndrome? What nerve is compressed and where is the pain/tingling felt?
- compression of the median nerve as it runs through the carpal tunnel
- lateral side of the hand (thumb)
What is a thenar muscle? What is the thenar eminence?
- intrinsic muscle of the hand that produces weak but precise movements
- thenar muscles except for the adductor pollicis
What is a hypothenar muscle? What is hypothenar eminence?
- intrinsic muscle of the hand that produces weak but precise movements
- hypothenar muscles that act of the little finger
What are the thenar muscles?
- abductor pollicis brevis
- flexor pollicis brevis
- opponens pollicis
- adductor pollicis
What are the hypothenar muscles?
- opponens digiti minimi
- abductor digiti minimi
- flexor digiti minimi
What are the intermediate muscles?
- palmar interossei (adduct 2,4,5 fingers)
- dorsal interossei (abduct 2,3,4 fingers)
- lumbricals (flex the proximal phalange, extend middle distal phalanges)
Iliopsoas
- composed of iliacus, psoas major, and psoas minor
- flexes thigh and trunk
Rectus Femoris
- flexes thigh
- extends leg
Sartorius
- weak flexion
- lateral rotation
- flexion of the knee
- criss-cross applesause
Gluteus Maximus
-extends the thigh
Gluteus Medius
- abducts the thigh
- lateral rotation
Gluteus Minimus
- abducts the thigh
- medial rotation
Tensor Fascia Latae
- abducts the thigh
- tightens the iliotibial band
Gracilis
-adducts the thigh
Vastus Lateralis
-extends the leg
Vastus Medialis
-extends the leg
Vastus Intermedius
-extends the leg
Biceps femoris
-flexes the leg
Semitendinosus
-flexes the leg
Semimembranosis
-flexes the leg
Tibialis Anterior
- dorsiflexes
- inverts
Extensor Hallucis Longus
-dorsiflexes the big toe
Extensor Digitorum Longus
-dorsiflexes the toes
Fibularis Tertius
- dorsiflexes
- everts
Fibularis Longus
- dorsiflexes the foot
- everts
Fibularis Brevis
- dorsiflexes the foot
- everts
Gastrocnemius
-plantar flexes the foot
Soleus
-plantar flexes the foot
Plantaris
-does not do much
Tibialis Posterior
- inversion
- plantar flexion
Flexor Hallucis Longus
-plantar flexes the big toe
Flexor Digitorum Longus
-plantar flexes the toes
What is the calcaneal tendon?
-a large tendon made up of the gastrocnemius and the soleus
What are the intrinsic plantar muscles of the foot?
- lumbricals
- Flexor Digiti Minimi Brevis
- Flexor Hallucis Brevis
- Flexor Digitorum Brevis
- Abductor Digiti Minimi
- Abductor Hallucis
What are the intrinsic dorsal muscles of the foot?
- Extensor Digitorum Brevis
- Extensor Hallucis Brevis