Dissection 10 Flashcards
What nerve supplies the anterior compartment of the arm?
musculocutaneous
What are the 3 muscles in the anterior compartment of the arm?
biceps brachii; coracobrachialis; brachialis
What are the proximal attachments of biceps brachii?
supraglenoid tubercle of the scapula via the long head and the coracoid process of th scapula via the short head
What 3 muscles attach to the coracoid process?
pectoralis minor; coracobrachialis and short head of biceps
how does the tedon of the long head of biceps brachii reach the supraglenoid tubercel of the scapula?
passes superiorly in the intertubercular groove of the humerus and then becomes enclosed within the fibrous layer of the shoulder joint capsule to then reach the tubercle
What are the distal attachments of biceps brachii?
biceps tendon which attaches to the radial tuberosity and the bicipital aponeurosis which blends with the deep fascia on the medial side of the proximal forearm
What is the name for the depp fasica on the medial side of hte proximal forearm?
antebrachial
What spinal nerve roots is the musculocutaneous nerve dervied from?
C5 and C6
What is the proximal attacment for coracbrcahialis?
coracoid process of the scapula
What is the distal attachment for coracobrachialis?
middle third of medial surface of humerus
Where is coracobrachialis found in relation to the other muscles of the anterior compartmnet of the arm?
deep to biceps brachiii and medial to brachialais
What seperates coracobrachialis from the triceps muscle/
medial intermuscular septae
What is the proximal attachment for the brachialis muscle?
distal half of anterior surface of humerus
What is the distla attachment for the brachialis muscle?
coronoid process and tuberosity of ulna
What separates brachialis from the triceps muscle??
lateral intermuscular septae
What is the relation of the brachialis muscle to the otehr muslces in the anterior compartment of the arm?
deep to biceps brachii and lateral coracobrachialis
What are the muscles of the anterior comaprtment of the forearm mainly suppleid by?
median nerve
What muscles in the anterior compartment of the forearm arent supplied by the median nerve?
flexor carpi ulnaris and the medial part (to digits 4 and 5) of flexor digitorum profundis
What nerve supplies the part of hte anterior forearm not supplied by the median nerve?
ulnar nerve
what is the proximal atttachment of the superficial layer of the anterior forearm?
common flexor tendon to the medial epicondyle of the humerus
What are the muscles of the superficial layer of the anterior forearm?
pronator teres; palmaris longus; flexor carpi radialis; flexor carpi ulnaris
What is the distal attachment of pronator teres?
middle of convexity of lateral surface of radius
What is the distal attachement of palmaris longus?
palmar aponeurosis
What is the distal attachment of flexor carpi radialis?
metacrapals on the radial side
what is the distal attachment for the flexor carpi ulnaris
metacarpals on the ulnar side
What are the proximal attachments ofr the intermediate compartment of the anterior forearm?
distal humerus; cornoid process of ulna and radial head
what is the distal attachment for the intermediate compartment of the forearm?
bodies of middle phalanges of medial 4 digits
What is the muscle of the intermediate compartment of the anterior forearm?
flexor digitorum superficialis
What are the muscles of the deep muscles of the anterior forearm?
flexor digitorum profundus; flexor pollicis longus and pronator quadratus
where do the deep muscles of the anterior forearm attach distally?
distal to the intermediate muscles
what is the proximal attachment for flexor digitorum profundus?
anterior surfaces of ulnar and interosseous membvrane
what is the proximal attachment for flexor pollicis longus?
shaft of radius and ulnar and interosseous membrane
what is the proximal attachmetn for the pronator quadratus?
between the distal anteior surfaces of radius and ulnar
What holds the long tendons of the anterior forearm in place at the wrist?
palmar carpal ligament
what holds the long tendons of the anterior forearm in place at hte carpus?
flexor retinaculum
what are the palmar carpal ligament adn the flexor retinaculum?
thickenings of the antebrachial fascia
What does the common flexor tendon attach proximally to?
medial epicondyle of the humerus
What is golfers elbow?
medial epicondylitis- tendonitis of the common flexor tendon which is felt as pain in the area of the medial epicondyle
What is the superior border of the cubital fossa?
a transverse line between the epicondyles of the humerus
What is the medial border of the cubital fossa?
pronator teres
What is the lateral border of the cubital fossa?
brachioradialis
what is the superficial contents of the cubital fossa?
median cubital vein; cephalic vein and the basilic vein and the medial and lateral cutaneous nerves o f the forearm
What else is palpable in the cubital fossa?
distal tendon (deep nad lateral) and aponeurosis (medial) of biceps brachii
What are the deep contents of the cubital fossa?
median nerve; brachial artery and the radial nerve
what is the relation of the nerves in the cubital fossa?
median nerve is ound medial to the radial nerve
What does the brachial artery bifurcate into at hte apex of the cubital fossa?
radial and ulnar arteryes
Where does the radial nerve divide into its uperficial and deep braches?
deep to brachialis
What nerve supplies the skin adn fascia of the cubital fossa?
the medial and lateral cutaneous nerves of the arma nd forearm
What is the cubital fossa?
a traingular space between skin adn the anterior aspec of the capsule of the elbow joint
how does the ulnar nerve reach the anterior compartment of the forearm?
crosses the posterior surface of the medial epicondyle of the humerus and then it passes through flexor carpi ulnaris
