Review Sheet Questions Flashcards
5 bony structures of the Sh. Complex
clavicle humerus scapula sternum rib cage
3 joints of the Sh. complex
sternoclavicular
acromioclavicular
glenohumeral
2 articulations/spaces of sh. complex
suprahumeral/subacromial
scapulothoracic
Structures that comprise the Sh, girdle
clavicle
scapula
humerus
& all joints (AC,SC,GH)
Function of the labrum
extends the glenoid fossa and keeps the humerus in place
Define scapulohumeral rhythm
Coordinated mvt. between the scapulothoracic space & the sh. girdle.
(2:1) 2- glenohumeral, 1- scapulothoracic
limited sternoclavicular motion limits what shoulder girdle motion
Sh. elevation
GH mvt. ABD & flexion
Define a dermatome innervation
a region of skin innervated by a single spinal nerve (cervical nerve root) C6-C7-C8
Define a cutaneous innervation
region of skin innervated from the terminal branches of the brachial plexus (MARMU)
Differences between C6 and Median nerve damage
C6 will have paresthesia on the thumb and radial side of the forearm.
Median nerve damage paresthesia is on the thumb, index, and middle finger.
Anterior sternoclavicular ligament
strong ligament that supports the weight of UE’s & prevents dislocation
acromioclavicular ligament
weak ligament that is made up of superior and inferior compartments & prevents dislocation of the AC joint.
coracohumeral
holds the head of the humerus in glenoid fossa & supports the upward portion of the humeral head
interclavicular ligament
strong ligament that limits depression of the sternoclavicular joint
coracoacromial
prevents upward dislocation of the humerus
anterior glenohumeral ligaments
provide weak support for the glenohumeral joint
Articular disk (function & location)
located in the sternoclavicular joint. serve as a hinge for motion & provide shock absorption at the sternoclavicular joint.
Structures that lie in the superhumeral space & their clinical importance
Rotator cuff muscles (supraspinatous infraspinatous, subscapularis, teres minor) biceps, subdeltiod.
Compression can cause a shoulder impingement.
closed pack position for the glenohumeral joint
ABD & ER
Muscles located between the rib cage and scapula
subscapulairs & serratus anterior
most superficial muscle on the posterior upper back
trapezius
Describe scapular winging
posterior displacement of the veterbral border
describe scapular tipping
the inferior angle of the scapula moves posteriorly while the superior border moves anteriorly
function of the rotator cuff muscles during sh. flexior of ABD
stabilize the humerus in the glenohumeral joint
muscle that lies on top of the rotator cuff’s distal attachment
deltoid
why are the deltoid and trapezius often reffered to as three different muscles
they are made up of three different sections of muscle fibers that all have different angles of pull
Closing a window by pulling down
motion & mover
Sh. extension.
Posterior deltoid & latisimuss dorsi
opening a window by pushing up
motion & mover
Sh. flexion
Anterior deltoid, biceps, & corocobrachialis
carrying a suitcase
motion & mover
scapular elevation
upper trapezius * levator scapuluaris
Combing the back of you hair
motion & mover
Sh. ER
infraspinatous & teres minor
Sh. ABD
deltoid & supraspinatous
Components of the brachial plexus
Roots Trunks Divisions Cords Terminal Branches
Formation of the roots
C5-T1
formation of the trunks
upper, middle, & lower
formation of the divisions
anterior & posterior
formation of the cords
lateral, medial, & posterior
formation of the terminal branches
MARMU
M.A.R.M.U.
musculocutaneous axillary radial median ulna
What cord is the radial nerve & why is it called the great extensor nerve
Posterior cord.
It innervates the extensor muscles of the elbow, wrist & fingers.
“Saturday night palsy”
radial nerve by the elbow is compressed, extensor muscles are affected resulting in a wrist drop.
Resting position for the scapula
3-8 inches from the spine between ribs 2 & 7
Function of the arterial system
carries oxygen rich blood away from the heart.
Function of the venous system
drainage system composed of veins to carry blood back to the heart.
Function of the lymphatic system
draws excess tissue fluid from the body’s interstitial fluid, filters it, then returns it to the blood stream thorough capilary filtration.
Muscles innervated by the musculocutaneous nerves
biceps brachialias, corcobrachialis
Muscles innervated by the axillary nerves
deltoid & teres minor
