Arm Flashcards
2 joints of shoulder + 2 additional joints giving movement
- scapulothoracic ( pseudojoint)
- glenohumeral (true joint)
- sternoclavicular
- acromioclavicular
6 movements of scap-throacic joint
- elevate
- depress
- retract
- protract
- up rotation (glenoid)
- down rotation
Origin, insertion, action, nerve of serratus ant.
Origin- ribs 1-9
Insert - vertbral scapula
Action - protract and up rotate scapula
Nerve - long thoracic
Origin, insertion, action, nerve of pec major
Origin- sternal and clavicular heads
Insert - intertubecular groove of humerus
Action - adduct, med rotate, flex arm
Nerve - med and lateral pectoral
Origin, insertion, action, nerve of pec minor
Origin- ribs 3-5
Insert - coracoid process
Action - protract and down rotate scapula
Nerve - med pectoral
Origin, insertion, action, nerve of trapezius
Origin- occipital bone and spinous process of C7-T12
Insert - spine of scapula, clavicle and acromion
Action - elevate or depress (depends on fibers) retract scapula
Nerve - CN11
Origin, insertion, action, nerve of latisimus dorsi
Origin- spinous process of T7-L5, illiac crest
Insert - intertubecular groove of humerus
Action - adducts, extends, med. rotates arm
Nerve - throaco-dorsal
position of rhomboid major and minor
minor on top
Origin, insertion, action, nerve of rhomboids
Origin- spinous process of C7-T5
Insert - vertebral border of scapula
Action - elevate, retract, down rotate scapula
Nerve - dorsal scapular
Origin, insertion, action, nerve of levator scapula
Origin- trans process of C1-3
Insert - vert angle of scapula
Action - elevates scapula
Nerve - dorso-scapular
2 movements of sternoclavicular joint
glides ant-post and sup-inf
ligaments of sternoclavicular joint (3)
ant. and post. sternoclavicular
interclavicular
movement of acromioclavicular joint
allows full shoulder elevation
intrinsic and extrinisic ligaments of acromioclavicular joint
intrinsic - acromioclavicular
extrinsic - coracoclavicular
movement of glenohumeral
all directions - circumduction
feature deepening glenoid fossa
glenoid labrum
intrinsic ligaments of glenohumeral joint
sup., med., inf. glenohumeral
extrinsic ligaments of glenohumeral joint
coracoacromial, and coracoclavicular
5 muscles of rotator cuff
- supraspinatus
- infraspinatus
- teres minor
- subscapularis
- teres major
Origin, insertion, action, nerve of supraspinatus
Origin- supraspinous fossa
Insert - greater tuberosity
Action - abduction, lateral rotation
Nerve - suprascapular
Origin, insertion, action, nerve of infraspinatus
Origin- infraspinous fossa
Insert - greater tuberosity
Action - lateral rotation
Nerve - suprascapular
Origin, insertion, action, nerve of teres minor
Origin- lateral border of scapula
Insert - greater tuberosity
Action - lateral rotation
Nerve - axillary
Origin, insertion, action, nerve of subscapularis
Origin- subscapular fossa
Insert - lesser tuberosity
Action - medial rotation
Nerve - upper and lower subscapular
Origin, insertion, action, nerve of teres major
Origin- inf. scapula
Insert - intertuberosity groove
Action - extends, adducts, lateral rotates arm
Nerve - lower subscapular
Anterior rami of brachial plexus
C5-T1
Origin, insertion, action, nerve of deltoid
Origin- clavicle, spine of scapula
Insert - deltoid tuberosity
Action - abduction, flexion and extension
Nerve - axillary
Borders of axilla
medial: rib and serattus ant.
lat: intertubecular sulcus
ant: pec maj and min
post: scapula and muscles
Terminal branches of BPlex (5)
- median
- radial
- ulnar
- axillary
- musculocutaneous
3 BPlex cords
medial, lateral, post.
3 trunks of BPlex
sup., middle, inf
Motor innervation of musculocutaneous
ANT upper arm
Motor innervation of median nerve
Ant forearm (except FCU and 1/2 FDP), thumb, lat. half of lumbricals
Motor innervation of ulnar
!/2 FDP, hypothenar, thumb adductor, medial lumbricals
motor innervation of radial nerve
all post. muscles of upper and lower arm
motor innervation of axillary
teres min, deltoid
path of blood to arm
brachiocephalic>subclavian>axillary>brachial>radial or ulnar>palmar arches
3 parts of axillary
1 - subclavian to pec min
2 - under pec min
3 - pec min to teres maj
branches off axillary 1
superior thoracic
branches off axillary 2
thoracoacromial