EXSC315 EXAM 3 + IMAGES

What muscle is being shown?

Flexor carpi radialis

What muscle is being shown?

Flexor capri ulnaris`

What muscle is being shown?

Palmaris longus

What muscle is being shown?

Pronator teres

What muscle is being shown?

Pronator quadratus

What muscle is being shown?

Extensor capri radialis longus

What muscle is being shown?

Extensor carpi radialis brevis

What muscle is being shown?

Extensor carpi ulnaris

What muscle is being shown?

Supinator

What muscle is being shown?

Flexor digitorum superficialis

What muscle is being shown?

Flexor digitorum profundus

What muscle is being shown?

Flexor pollicis longus

What muscle is being shown?

Extensor digitorum

What muscle is being shown?

Extensor pollicis longus

What are the bones involved in the head, neck, and trunk?

Skull, vertebral spine, thoracic cage.

What are the skulls key attachments?

Occipital bone and mastoid process

List the order of the spine from top to bottom with the #

Cervical 7

Thoracic 12

Lumbar 5

Sacrum 5

Coccyx 4

What are the major muscles/groups that are involved in the head, neck and trunk?

Sternocleidomastoid

Erector Spinae

Abdominal Muscles

What are the abdominal muscles of the head, neck, and trunk?

Internal obliques

External obliques

Rectus abdominis

Transverse abdominis

What muscle is being described?

O — Manubrium of sternum; clavicular head

I — Mastoid process of temporal bone

A — Flexes neck laterally and rotates head to opposite side

Contraction of both sides together (bilateral) simply flexes the neck

sternocleidomastoid

(T/F) The sternocleidmastoid can rotate.

False

Who plays the neutralizer role during scapular elevation?

Sternocleidmastoid

What muscle is this?

Sternocleidmastoid

What makes up the erector spinae (lateral to medial).

Iliocosalis group

Longissimus group

Spinalis group

What makes up the erector spinae (medial to lateral).

Spinalis group

Longissimus group

Iliocostalis group

What are the actions of the erector spinae?

Bilateral contraction: extends neck and back, maintaining posture

Unilateral contraction: lateral flexion

How is external oblique directed?

Inferiomedial

How is internal oblique directed?

Superiomedial (opposite of external)

How is transverse abdominis directed?

Horizontal

How are rectus abdominis directed?

Connected to the sterum and public bone

What muscle is being described?

O — Pubis and pubic symphysis

I — Xiphoid process, costal cartilages

A — Trunk/vertebral flexion

Rectus abdominis

What muscle is this?

Rectus abdominis

What muscle is being described?

O — Lower 8 ribs

I — Anterior iliac crest and by the abdominal aponeurosis

A — Laterally flexes and rotate the trunk/vertebral column

Trunk flexion

External oblique

How does the external oblique run?

Diagonally downward and medially

What muscle is this?

External oblique

What muscle is being described?

O — Lateral inguinal ligament, iliac crest, and thoracolumbar fascia

I — Internal surface of lower 3 ribs, rectus sheath to linea alba

A — Laterally flexes and rotates the trunk, assist flexes the trunk

Internal Oblique

How do the internal oblique fibers run?

Diagonally upward and medially

What muscle is this?

Internal oblique

What muscle is being described?

O — Lateral inguinal ligament, iliac crest, thoracolumbar fascia, internal surface of lower 6 ribs

I — Rectus sheath to linea alba

A — Laterally flexes and rotates the trunk, assists in trunk flexion

Transverse abdominis

What is the deepest abdominal muscle?

Transverse abdominis

What muscle is this?

Transverse abdominis

What are the major muscles that move the pectoral girdle anteriorly?

Pectoralis minor and serratus anterior

What are the major muscles that move the pectoral girdle posteriorly?

Rhomboids, trapezius, levator scapulae

What muscle is being described?

O — Ribs 1-8

I — Medial border of scapula

A — Scapular protraction, upward rotation of scapula

Serratus anterior

What is the “boxing muscle”

Serratus anterior

What muscle is this?

Serratus anterior

What muscle is being described?

O — Ribs 3-5

I — Coracoid process of scapula

A — Protracts and depresses scapula

Pectoralis minor

What muscle is this?

Pectoralis minor

What muscle is being described?

O — Occipital bone and spines of the cervical/thoracic vertebrae

I — Clavicle, Acromion process and spine of scapula

A — Stabilizes, raises (elevates), retracts and rotates the scapula

Trapezius

What muscle is this?

Trapezius

Superior fibers ___ scapula.

elevate

Middle fibers ___ scapula.

retract

Inferior fibers ___ scapula.

depress

R major is ___ and ___ to R minor.

larger, inferior

What muscle is being described?

O — Spinous processes of C7-T5

I — Medial border of the scapula below the scapular spine

A — Scapular retraction, elevation, downward rotation

Rhomboids

What muscle is this?

R minor

What muscle is this?

R major

What muscle is being described?

O — Posterior tubercles of transverse process of C1-C4 vertebrae

I — Superior part of medial border of scapula

A — Elevates scapula, tilts glenoid cavity inferiorly

Levator scapulae

What muscle is this?

Levator scapulae

What are the muscles that move the glenohumeral joint?

Deltoid and pectoralis major, Latissimus dorsi, Rotator cuff muscles

What muscle is being described?

O — Clavicle, sternum, costal cartilages of ribs 1-6

I — Intertubercular groove of the humerus

A — Arm adduction, internal rotation, flexion, extension, horizontal adduction

Pectoralis major

What muscle is this?

Pectoralis major

What muscle is being described?

O — Acromion process, spine of scapula, clavicle

I — Deltoid tuberosity of humerus

A — Anterior, lateral, posterior

Deltoid

What is the action of the 3 deltoids?

Anterior- flexion, medial rotation

Lateral- abduction

Posterior- extension, lateral rotation

What muscle is this?

Deltoid

What muscle is being described?

O — Lumbodorsal fascia into spinous processes, Lower 6 thoracic vertebrae, Lower 4 ribs, Iliac crest

I — Intertubercular groove of the humerus

A — Prime mover of arm extension, arm adduction, medial rotation

Latissimus dorsi

What muscle is this?

Latissimus dorsi

What are the rotator cuff muscles?

Subscapularis, supraspinatus, infraspinatus, teres minor

What muscle is being described?

O — Infraspinous fossa of scapula

I — Greater tubercle of the humerus

A — External rotation, adduction of the arm and stabilization of shoulder

Infraspinous

What muscle is this?

Infraspinatus

What muscle is being described?

O — Subscapular fossa of the scapula

I — Lesser tubercle of the humerus

A — Internal rotation and stabilization of the shoulder

Subscapularis

What muscle is this?

Subscapularis

What muscle is being described?

O — Axillary border of the scapula

I — Greater tubercle of the humerus

A — External rotation, adduction of the arm; pulls the head of the humerus into the glenoid cavity

Teres minor

What muscle is this?

Teres minor

What muscle is being described?

O — Supraspinous fossa of the scapula

I — Greater tubercle of the humerus

A — Abduction of arm and stabilization of shoulder

Supraspinatus

What muscle is this?

Supraspinatus

The elbow joint is a ____ joint found in the upper limb between the ___ and ____.

synovial, arm, forearm

What is the articulation of the elbow?

Humerus, radius, ulna

What are the key flexors of the forearm?

Biceps brachii, brachialis

Brachioradialis (synergist)

What are the key extensors of the forearm?

Triceps brachii

What muscle is being described?

O — Lower front half of humerus

I — Ulna

A — Primary flexor of elbow

Brachialis

What muscle is this?

Brachialis

What muscle is being described?

O — Lateral aspect of the distal humerus above the lateral epicondyle

I — Lateral aspect of the distal radius

A — Assists in flexion of the elbow

Primarily in the forearm, it crosses the

Brachioradialis

What is the only muscle to run the length of forearm but not cross wrist?

Brachioradialis

What is the muscle?

Brachioradialis

The triceps brachii is the only muscle located on the ____ arm.

posterior

What muscle creates extension at the elbow and shoulder?

Triceps brachii

The ____ are located on the anterior/medial side of the forearm.

flexors

The _____ are positioned on the posterior/lateral side.

extensors

The brachioradialis and shaft of the ulna can be used as clear _____ _____ between these muscle groups.

dividing lines

What muscle is being described?

O — Medial epicondyle of humerus

A — Produces flexion of the wrist, hand, fingers, Pronation of the wrist

Anterior forearm

What muscle is being described:

O — Lateral epicondyle of humerus

A — Produces extension of the wrist, hand, fingers, Produce supination of the wrist

Posterior forearm

What muscle is being described?

O — Medial of epicondyle

i — Base of 2nd 3rd metacarpal

A — Assists in wrist flexion and abduction of wrist

Flexor carpi radialis

What muscle is being described?

Flexor capri ulnaris

What muscle is being described?

Palmaris longus

What muscle is being described?

Pronator teres

What muscle is being described?

Pronator quadratus

What is the only muscle that attaches only to the ulna at one end and only to the radius at the other end.

Pronator quadratus

What muscle is being described?

Extensor carpi radialis longus

What muscle is being described?

Extensor carpi radialis brevis