Lab 4 - Upper Extremity Bones & Soft Tissues of Arm and Shoulder

Movement

Shoulder Movement

1. flexion

2. extension

3. abduction

4. adduction

5. internal/medial rotation

6. external/lateral rotation

Scapulothoracic Movement

1. elevation

2. depression

3. adduction (retraction)

4. abduction (protraction)

5. upward rotation

6. downward rotation (return to anatomical position)

Clavicle Bone

Acromial End

Sternal End

shaft of clavicle

conoid tubercle

groove for subclavius muscle

Sternum Bone

manubrium

body

xiphoid process

Scapula Bone

acromion

coracoid process

glenoid cavity

scapular notch

inferior angle

supraspinous fossa

spine of the scapula

infraspinous fossa

subscapular fossa

Humerus Bone

head of humerus

greater tubercle

lesser tubercle

deltoid tuberosity

radial fossa

coronoid fossa

olecranon fossa

lateral epicondyle

medial epicondyle

trochlea

capitulum

Soft Tissues of Shoulder and Arm (Anterior View Superficial)

deltoid muscle

subscapularis

coracobrachialis

biceps brachii

brachialis (deep)

median nerve

ulnar nerve

brachial artery

axillary artery

axillary vein

cephalic vein

basilic vein

median cubital vein

brachial vein

Soft Tissues of Shoulder and Arm (Anterior View Deep)

coracobrachialis muscle

brachialis muscle

subscapularis

teres major

median nerve

ulnar nerve

musclulocutaneous nerve

brachial artery

axillary artery

cephalic vein

basilic vein

median cubital vein

brachial vein

axillary vein

Soft Tissues of Shoulder and Arm (Posterior View)

triceps brachii muscle

anconeus muscle

deltoid

teres major

teres minor (deep)

supraspinatus

• deep, under outlined muscle

infraspinatus (deep)

radial nerve

axillary nerve

cephalic vein

ulnar nerve

brachial artery

brachial vein

basilic vein

median cubital vein

Histology

Striated Muscle

• muscle fibers: thick lines of pink

• A band: black

• I band: pink

• nuclei: black dots

Dense Regular Connective Tissue

• collagen fibers: light pink areas

• fibroblasts: dark pink dots

• ground substance: mint green

Adipose Tissue

Neuromuscular Junction

• axon terminals: black dots

• motor neuron axon: branch-like

• skeletal muscle: lines of red/pink

Surface Anatomy

scapular spine

• long horizontal line, lump

• medial = low

• lateral = higher

• think: up and out

acromion process

lateral-most scapular spine

acromioclavicular (AC) joint

where collarbone and acromion process meet (front shoulder)

inferior angle of scapula

where shoulder blades stick out on back

coracoid process

anterior side shoulder blade (push in near armpit)

tendon of biceps brachii long head

• superior, anterior of humerus

• in front of the top shoulder bump

brachial artery

medial brachium —> dig under

biceps tendon (distal insertion)

anterior elbow

triceps tendon (distal insertion)

• above posterior elbow

body of clavicle

middle of collarbone

sternoclavicular joint

front 2 bumps of collarbone

manubrium of sternum

top of sternum

body of sternum

middle of sternum