Lab #6 Muscles of the Trunk and Limbs

What Three muscles cause elevation of the scapula?

Levator scapulae, trapezius (superior fibers), rhomboid

What causes depression of the scapula? (2 muscles)

pectoralis minor, and trapezius (inferior fibers)

What causes protraction of the scapula (2 muscles)?

Pectoralis minor and serratus anterior

What causes retraction of the scapula (two muscles)?

Rhomboid, and trapezius (middle fibers)

For the upper limbs are the flexors on the anterior side of the limb and the extensors on posterior side of limb?

Yes

Where are the flexors on the upper limbs?

anterior side of the limb

Where are the extensors, for the upper limb located?

posterior side of the limb

For the lower limbs where are the flexors?

posterior side of the limb

For the lower limbs where are the extensors?

anterior side of the limb

For the lower limbs where are the adductors?

medial side of the thigh

What are the four muscles that act upon the scapula?

Rhomboid, levator scapulae, trapezius and the pectoralis minor

What are the eight muscles that act upon the arm?

Deltoid, latissimus dorsi, pectoralis major, Teres major, supraspinatus, infraspinatus, teres minor and the subscapularis

What are the attachment sites of the pectoralis major?

Proximal: Sternum, clavicle and the ribs

Distal: Intertuberculer sulcus of the humorous

What are the actions of the pectoralis major?

Flexion, medial rotation, and adduction of the arm

What are the attachment sites of the supraspinatus?

Proximal: supraspinous fossa of scapula

Distal: Greater tubercle of humerus

What are the actions of the supraspinatus?

abduction of the arm

What are the attachment sites of the infraspinatus?

Proximal: Infraspinous fossa of scapula

Distal: Greater tubercle of humerus

What are the actions of the infraspinatus?

adduction and lateral rotation of arm

What are the attachment sites of the teres minor?

Proximal: lateral edge of scapula

Distal: Greater tubercle of humerus

What are the actions of the teris minor?

Adduction and lateral rotation of the arm

What are the attachment sites of the subscapularis?

Proximal: subscapular fossa

Distal: Lesser tubercle of humerus

What are the actions of the subscapularis?

Medial rotation of the arm

What are the attachment sites of the biceps brachii?

Proximal: Scapula

Distal: Radial tuberosity

What are the actions of the biceps brachii?

flexion and supination of the forearm

What are the attachment sites of the triceps brachii

Proximal: Scapula and humerus

Distal: Olecranon of ulna

What are the actions of the triceps brachii

extension of the forearm

What are the attachment sites of the gluteus maximus?

Proximal: Ilium, sacrum and coccyx

Distal: Posterior side of femur

What are the actions of the gluteus maximus

Extension and lateral rotation of thigh at hip

What are the attachment sites of the gluteus medius

Proximal: Ilium

Distal: Greater trochanter of femur

What are the actions of the gluteus medius

abduction of thigh at hip

What are the attachment sites of the gluteus minimus

Proximal: Ilium

Distal: greater trochanter of femur

What are the actions of the gluteus minimus

abduction of thigh at hip

What are the attatchment sites of the quadriceps femoris?

Proximal: Ilium, greater trochanter of femur and shaft of femur

Distal: Tibial tuberosity of tibia

What are the actions of the quadriceps femoris

extension of the knee

What are the attachment sites of the gastrocnemius

Proximal: Lateral and medial condyles

Distal: calcaneus (gastrocnemius and soleus attach to calcaneus via the calcaneal tendon)

What are the actions rhomboid?

Elevation, retraction and rotation of the scapula

What are the actions levator scapulae

elevation and rotation of scapula

What are the actions of the trapezius?

Superior fibers- elevation of scapula

Middle fibers- retraction of scapula

Inferior fibers- depression of scapula

What are the actions of the pectoralis minor?

Depression and protraction of scapula

What are the actions of the deltoid

abduction, flexion, extension, and rotation of the arm

What are the actions latissimus dorsi?

extension, medial rotation and adduction of the arm

What are the actions brachialis

flexion of forearm

What are the actions brachioradialis

flexion of forearm

What are the actions flexor carpi radialis

flexion of the wrist and abduction of hand

What are the actions flexor carpi ulnaris

flexion of wrist and adduction of hand

What are the actions flexor digitorum

flexion of wrist and digits

What are the actions extensor carpi radialis

extension of wrist and abduction of hand

What are the actions extensor carpi ulnaris

extension of wrist and adduction of hand

What are the actions digitorum

extension of wrist and digits

Action of the iliopsoas

Flexion of thigh at hip

What are the actions of the adductors

adduction of the thigh

What are the actions of the sartorius

flexion of thigh and knee and lateral rotation of thigh

What are the actions of the hamstring

flexion of knee

What are the actions of the soleus

flexion of foot

Removing a section of the flexor carpi radialis and pronator teres on the model exposes what forearm muscle

flexor digitorum

What deep muscle travels along radius

supinator

Where can the brachialis muscle be seen on the arm model?

medial to biceps brachii

Muscles located on the anterior side of the forearm share what common action?

flexion

Which elbow flexor also travels the length of the lateral side of the forearm

brachioradialis

Where can the pronator teres muscle be seen on the model

superficial view of forearm

What is #1

Infraspinatus

What is #2

Teres Minor

What is #3

Teres Major

What is #4

Triceps brachii

What is #5

Biceps Brachii

What is #6

Brachialis

What is #1

Triceps Brachii

What is #2

deltoid

What is #3

Biceps Brachii

What is #4

Brachialis

What is #1

Biceps Brachii

What is #2

pronator teres

What is #3

Brachioradialis

What is #4

subscapularis

What is #5

teres major

What is #6

triceps brachii

What is #7

flexor carpi radialis

What is #8

flexor carpi ulnaris

What is #1

flexor digitorum

What is #1

Infraspinatus

What is #2

Teres Minor

What is #3

Teres Major

What is #4

Triceps Brachii

What is #5

Extensor carpi ulnaris

What is #6

deltoid

What is #7

biceps Brachii

What is #8

brachialis

What is #9

brachioradialis

What is #10

extensor carpi radialis

What is #11

extensor digitorum

What is #1

sartorius

What is #2

iliopsoas

What is #3

quadriceps femoris

What is #1

gluteus maximus

What is #2

hamstrings

What is #1

gluteus maximus

What is #2

adductors

What is #3

iliopsoas

What is #4

sartorius

What is #1

soleus