Anatomy of the upper limb 10/10/18 Flashcards
What type of joints are the finger joints?
Hinge
What type of joint is the 1st MCP joint?
Saddle Joint
What 2 muscles are innervated by the spinal accessory nerve?
Trapezius
Sternocleidomastoid
What nerve innervates the Rhomboid minor and major?
Dorsal scapula nerve
What nerve supplies the serratus anterior muscle?
Long thoracic nerve
What nerve supplies the levator scapulae?
Dorsal scapula nerve
What is the function of the rotator cuff?
Keeps the humoural head in the glenoid fossa
What are the 4 rotator cuff muscles?
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
What three rotator cuff muscles attach to the greater tuberosity?
Supraspinatus
Infraspinatus
Teres minor
Which rotator cuff muscle attaches to the lesser tuberosity?
Subscapularis
What muscle is responsible for the first 15 degrees of abduction?
Supraspinatus
Which rotator cuff is most likely to tear?
Supraspinatus
How much of the humeral head is present in the glenoid fossa at any time?
1/3rd
How many compartments in the arm?
2
Anterior
Posterior
What are the three muscles in the anterior compartment of the arm?
Biceps brachii
Brachialis
Coracobrachialis
What innervates the anterior compartment of the arm?
Musculocutaneous nerve
What is in the posterior compartment of the arm?
Triceps brachii
What innervates the posterior compartment of the arm?
Radial nerve
How many layers of the anterior compartment of the forearm?
3
What is in the superficial layer of the anterior compartment of the forearm?
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
What muscle is in the intermediate layer in the anterior compartment of the arm?
Flexor digitorum superficialis
What is in the deep layer of the anterior compartment of the forearm?
Flexor pollicis longus
Flexor digitorum profundus
Pronator quadratus
What supplies the anterior compartment of the forearm?
Median nerve
What supplies flexor carpi ulnaris and flexor digitorum superficialis?
Ulnar nerve
How many layers are in the posterior compartment of the forearm?
2
superficial
Deep
What muscles are in the superficial posterior compartment of the forearm?
Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Anconeus Extensor digitorum Extensor carpi ulnaris Extensor digiti minimi
What muscles are in the deep posterior compartment of the forearm?
Supinator
Abductor pollicis longus
Extensor pollicis longus
Extensor indicis
What innervates the posterior compartment of the forearm?
Radial nerve
What is in the thenar eminence of the hand?
Abductor pollicis brevis
Flexor pollicis brevis
Opponenes pollicis
What innervates the thenar eminence?
Recurrent branch of the median nerve
What is in the hypothenar eminence?
Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi
What innervates the hypothenar eminence?
Deep branch of ulnar nerve
How many lumbricals are there?
4
How many types of interossei are there?
2
DAB
PAD
What is responsible for most of the hand movements?
Ulnar nerve
Where does the brachial plexus originate from?
C5-T1
What does the brachial plexus supply?
The whole forearm
How does the brachial plexus travel?
Through axilla to the medial arm
Travels around the brachial artery
From proximal to distal what are the components of the brachial plexus?
Roots Trunks Divisions Cords Nerves
What nerves does the brachial plexus become?
Musculo-cutaneous Axillary Radial Median Ulnar
What is the carpal tunnel formed by?
Flexor retinaculum
Carapal
What are the contents of the carpal tunnel?
Flexor digitorum superficialis x4
Flexor digitorum profundus x4
Flexor pollicis longus
Median nerve
What is carpal tunnel syndrome and what causes it?
Compression of the median nerve
Weakness of the thenar muscles
Numbness in digits 1-3 and half of digit 4
If it is carpal tunnel syndrome where will a patch of sensation be present?
Small patch in the lower centre of palm
Where do the arteries of the arm anastamose?
Elbow
Scapular anastomosis
Superficial and deep palmar arch
What arteries are dominant in the superficial and deep palmar arches?
Superficial - Ulnar
Deep - Radial
What arteries anastamose in the scapular anastamosis?
Suprascapular artery
Doral scapular artery
Circumflex scapular artery
What are the joints of the upper limb?
Sternoclavicular joint Acromoclavicular joint Glenohumeral joint Elbow joint - Humeroulnar joint, radiohumeral joint Proximal radioulnar joint Distal radiounlar joint Radiocarpal joint
What kind of joint is the Acromoclavicular joint?
Plane joint
What kind of joint is the Glemohumeral joint?
Ball and socket
What kind of joint is the Sternoclavicular joint?
Saddle
What kind of joint is the elbow joint?
Hinge
What kind of joint are the Proximal and distal radioulnar joint?
Pivot
What kind of joint is the Radiocarpal joint?
Ellipsoid
Does the radius or ulnar cross over during pronation?
Radius
What are the axioappendicular muscles?
Trapezius Serratus anterior Rhomboid minor and major Subclavius Latissimus dorsi Levator scapulae
What muscles are in the scapulae region?
Levator scapulae
Rotator cuff
What is the function of the anterior compartment of the arm?
Felxion of arm and forearm
Supinates forearm
What is the function of the posterior compartment of the arm?
Extension of arm and forearm
What is the action of the anterior compartment of the forearm?
Flexion of wrist and digits
Pronation
Abduction and adduction of wrists
What is the function of the posterior compartment of the forearm?
Extension of the wrist and digits
Supination
Abduction
Adduction
Which eminence is affected by carpal tunnel syndrome?
Thenar eminence
What is the function of the dorsal interossei?
Abduction of digits
What is the function of the palmar interossei?
Adduction of digits