Chapter 11 Study Guide

 

origin

insertion

belly

mechanical advantage

mechanical disadvantage

what is most closely related to range of motion? (fiber length or cross-sectional area of muscle?)

what is most closely related to power? (fiber length or cross-sectional area of muscle?)

agonist or prime mover

antagonist

synergist

fixator

compartment

 

deltoid

O=clavicle, scapula (acromion, spine)

I=humerus (deltoid tuberosity)

A=flexion, extension, abduction (of arm)

coracobrachialis

O=scapula (coracoid process)

I=humerus (mid medial shaft)

A=flexion, adduction (of arm)

latissimus dorsi

O=T vertebrae, L vertebrae, inf. 4 ribs, ilium (crest)

I=humerus (intertubercular sulcus)

A=extension, adduction (of arm)

teres major

O=scapula (inf. angle)

I=humerus (intertubercular sulcus)

A=extension, adduction (of arm)

supraspinatus

O=scapula (supraspinous fossa)

I=humerus (greater tubercle)

A=abduction (of arm)

pectoralis major

O=clavicle, sternum, ribcage

I=humerus (greater tubercle, intertubercular sulcus)

A=adduction (of arm)

 

triceps brachii

O=scapula (below glenoid), humerus (posterior)

I=ulna (olecranon)

A=extension (of forearm)

brachialis

O=humerus (distal anterior)

I=ulna (coronoid process & tuberosity)

A=flexion (of forearm)

biceps brachii

O=scapula (above glenoid, coracoid process)

I=radius (radial tuberosity)

A=flexion (of forearm)

supinator

O=humerus (lateral epicondyle), ulna

I=radius (lateral proximal 1/3rd)

A=supination (of forearm)

pronator teres

O=humerus (medial epicondyle), ulna (coronoid process)

I=radius (mid lateral surface)

A=pronation (of forearm)

pronator quadratus

O=ulna (distal)

I=radius (distal)

A=pronation (of forearm)

 

 

gluteus maximus

O=ilium, sacrum, coccyx

I=femur

A=extension (of thigh/leg at hip)

psoas major

O=L vertebrae

I=femur (lesser trochanter)

A=flexion (of thigh/leg at hip)

iliacus

O=ilium (iliac fossa), sacrum

I=femur (lesser trochanter)

A=flexion (of thigh/leg at hip)

adductor longus

O=pubis

I=femur (linea aspera)

A=adduction (of thigh/leg at hip)

gluteus medius

O=ilium

I=femur (greater trochanter)

A=abduction (of thigh/leg at hip)

 

 

HAMSTRINGS

semimembranosus

O=ischium (ischial tuberosity)

I=tibia (medial condyle)

A=flexion (of lower leg at knee)

semitendinosus

O=ischium (ischial tuberosity)

I=tibia (proximal medial shaft)

A=flexion (of lower leg at knee)

biceps femoris

O=ischium (ischial tuberosity), femur (linea aspera)

I=fibula (head), tibia (lateral condyle)

A=flexion (of lower leg at knee)

QUADRICEPS FEMORIS

rectus femoris

O=ilium

I=patella (tibial tuberosity)

A=extension (of lower leg at knee)

vastus medialis

O=femur (anteromedial)

I=patella (tibial tuberosity)

A=extension (of lower leg at knee)

vastus lateralis

O=femur (anterolateral)

I=patella (tibial tuberosity)

A=extension (of lower leg at knee)

vastus intermedius

O=femur (anterolateral)

I=patella (tibial tuberosity)

A=extension (of lower leg at knee)