LECTURE 2 ANATOMY OF UPPER LIMB Flashcards
what are 3 distinguishing fatures of a joint?
joint cavity, bone ends covered with articular cartilage, articulating surfaces & joint cavity enclosed by articular capsule
what are the types of synovial joints?
gliding, hinge, pivot, ellipsoid, saddle, ball & socket
what is the movement & example of gliding joint?
slight nonaxial/multiaxial e.g. acromioclavicular joint, vertebrocostal joint
what is the movement & example of hinge joint?
monaxial e.g. elbow, knee, ankle
what is the movement & example of pivot joint?
monaxial (rotation) e.g. atlas/axis, radio-ulnar joint
what is the movement & example of ellipsoid joint?
biaxial e.g. radiocarpal joint, metatarsophalangeal joint
what is the movement & example of saddle joint?
biaxial e.g. 1st carpometacarpal joint
what is the movement & example of ball & socket?
triaxial e.g.shoulder joint
what is the joints of the shoulder region?
acromioclavicular, sternoclavicular & glenohumeral joint
what type of joint is glenohumeral joint?
synovial, multiaxial, ball & socket
what are the ligaments of the glenohumeral joint?
coracoacromial, coracohumeral, glenohumeral
what are the movements of the glenohumeral joint?
flexion/extension, abduction/aduction, internal (medial), external (lateral) rotation
what are the flexors of the shoulder region?
pectoralis major, biceps brachii, deltoid (anterior)
what are the extensors of the shoulder?
latissimus dorsi, teres major, deltoid (posterior), triceps brachii
what are the abductor of shoulder?
deltoid (middle)
what are the adductor of shoulder?
pectoralis major, latissimus dorsi, teres major
what are medial rotator of shoulder?
subscapularis, deltoid (anterior), pectoralis major, latissimus dorsi, teres major
what are lateral rotator of shoulder?
deltoid (posterior), supraspinatus, infraspinatous, teres minor
what type of joint is sternoclavicular joint?
synovial, multiaxial, plane
what are the ligaments of sternoclavicular joint?
costoclavicular
what is the role of the articular disc in sternoclavicular joint?
absorbs shock, restrains movement- attached to joint capsule
what are the movements of the sternoclavicular joint?
gliding between clavicle & sternum is all directions
what type of joint is acromioclavicular joint?
synovial, multiaxial, plane
what are ligaments of acromioclavicular joint?
coracoclavicular with partial articular disc
what are movements of acromioclavicular joint?
gliding between clavicle & acromin in all directions
what are the elevators of shoulder girdle?
trapezius (upper), levator scapulae
what are depressor of shoulder girdle?
trapezius (lower)
what are protractor of shoulder girdle?
serrator anterior
what are retractors of shoulder girdle?
rhomboid muscles, trapezius (middle)
what are medial rotator of shoulder girdle?
rhomboid muscles, levator scapulae
what are the lateral rotator of shoulder girdle?
trapezius (upper & lower), serratus anterior
what are the joints of the elbow?
ulnohumeral, radiohumeral, proximal (superior) radioulnar
what type of joint is elbow joint?
synovial, uniaxial, hinge
what are the ligaments surrounding elbow joint?
lateral (radial) collateral, medial (ulna) collateral, annular
what types of movements can elbow joint do?
flexion, extension
what are muscles are flexors (anterior) of elbow?
brachialis, biceps brachii
what muscles are extensors (posterior) of elbow?
triceps brachii
what type of joint is proximal radioulnar joint?
synovial, uniaxial, hinge
what are the ligaments surrounding proximal radioulnar?
annular
what type of movements does radioulnar joint do?
supination + pronation
what type of joint is distal radioulnar joint?
synovial, uniaxial, pivot
what gives the distal radioulnar joint stability?
interosseous membranc + articular disc
what are the movements of the distal radioulnar joint?
supination + pronation
what muscles are involved in supination?
biceps brachii + supinator
what muscles are involved in pronation?
pronator teres + pronator quadratus
what are the joints on wrist region?
distal (inferior) radioulnar + radiocarpal & midcarpal
what type of joints are radio- & midcarpal joints?
synovial, biaxial, ellipsoid
what ligaments surround radio- & midcarpal joints?
lateral (radial) collateral + medial (ulnar) collateral
what type of movements does radio- & midcarpal joints do?
flexion-extension, abduction-adduction, radial deviation-ulnar deviation
what muscles are involved in flexion of wrist joint complex?
flexor carpi radialis + flexor carpi ulnaris
what muscles are involved in extension of wrist joint?
extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi radialis ulnaris
what muscles are involved in abduction (radial deviation) of wrist joint?
flexor carpi radialis, extensor carpi radialis longus, extensor carpi radialis brevis
what muscles are involved in adduction (ulnar deviator) of wrist joint?
flexor carpi ulnaris, extensor carpi ulnaris
what are the joints of the thumb & finger?
1st carpometacarpal, metacarpophalangeal, interphalangeal
what type of joint is 1st carpometacarpal joint?
synovial, biaxial, saddle
what are the movements of 1st carpometacarpal joint?
flexion-extension, abduction-adduction, opposition
what type of joint is interphalangeal joint?
synovial, uniaxial, hinge
what type of movement does interphalangeal joint do?
flexion-extension
what muscles are involved in flexion of thumb & finger?
flexor digitorum superficialis, flexor digitorum profundus, flexor policis longus
what muscles are involved in extension of thumb & finger?
extensor digitorum, extensor digiti minimi, extendor indicis, extensor pollicis longus, extensor pollicis brevis
what muscles are involved in opposition of thumb & finger?
thenar muscles, hypothenar muscles
what does the brachial plexus of nerves provide function to?
sensory/cutaneous (skin) + motor (muscles)- supplies the whole arm
what nerves constitute the brachial plexus?
c5-t1 spinal nerves, axillary nerve, musculocutaneous nerve, radial nerve, ulnar nerve, median nerve
where does the musculocutaneous nerve arise from & travels to?
lateral cord of brachial plexus (C5-C7) to lateral cutaneous nerve of forearm
what does the musculocutaneous nerve penetrate?
coracobrachialia
what does the musculocutaneous nerve supply?
anterior compartment of arm- flexion + cutaneous/sensory function
what constitutes the anterior compartment of arm?
biceps brachii, brachialis, coracobrachialis
where does the axillary nerve arise from?
posterior cord of brachial plexus (C5, C6)
what does the axillary motor nerve supply?
deltoid, triceps (long head) & teres minor
what is the sensory functions of the axillary nerve?
gives rise to upper lateral cutaneous nerve of arm, which innervates skin over lower deltoid
where does the median nerve arise from?
lateral & medial cord of brachial plexus
what does the median nerve innervate?
pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis muscle, flexor digitorium profundus, flexor pollicis longus (flexors of forearm except flexor carpi ulnaris + flexor digitorum profundus)
what does the median nerve innervate in hand?
motor innervation to 1st & 2nd lumbrical muscles, thenar eminence
where does the ulnar nerve arise from?
C8 and T1 (medial cord)
what does the ulnar nerve innervate?
flexor carpi ulnaris, flexor digitorum profundus, lumbrical muscles, opponens digiti minimi, flexor digiti minimi, abductor digiti minimi, adductor pollicis
where does the radial nerve arise from & travel to?
posterior cord of brachial plexus (C5, C6) & travels to posterior interosseous nerve
what does the radial nerve innervate?
posterior compartment of arm & forearm- extension- triceps and extensor muscles
what constitutes the posterior compartment of the arm?
triceps brachii & anconeus
what are the branches of arch of aorta?
brachiocephalic trunk, left common carotid, left subclavian
what is the arterial supply to upper limb?
subclavian artery, axillary artery, brachial artery
what are the branches of the brachial artery?
radial & ulnar artery
what are the arteries of the hand?
ulnar & radial
what are the deep veins of the arm?
subclavian, axiliary, brachial vein, ulnar, radial
what are the superficial veins of arm?
cephalic vein, basilic vein, median cubital vein
what is the drainage pattern of the arm?
radial + ulna to brachial to axillary to subclavian to brachiocephalic vein to SVC
what does the cephalic vein connect to basilic vein by?
median cubital vein
what does the cephalic & basilic vein drain to?
axiliary vein & median cubital vein
what does the cephalic & basilic drain from?
dorsal venous netowrk of hand