1.3.1 Arm Flashcards
Muscles in the anterior compartment of the arm are innervated by?
Musculocutaneous nerve
Muscles in the posterior compartment of the arm are innervated by?
Radial Nerve
The two muscle compartments of the arm are separated by?
Dense connective Tissue: Lateral intermuscular septum and medial intermuscular septum
What is the origin of the short head of the bicep brachii?
Coracoid process
What is the origin of the long head of the bicep brachii?
Supraglenoid tubercle
The Long Head of the bicep brachii runs inside the ____ and is fixed into place by the ____?
Intertubercular groove
Transverse humeral ligament
Distal end of the bicep brachii forms a tendon that will attach?
Tuberosity of the radius
What other structure forms from the distal end of the bicep brachii? What does this merge with?
Bicipital aponeurosis merges with the antebrachial (deep) fascia
What is the function of the bicipital aponeurosis?
To protect the brachial artery and the median nerve. It also aids in lessening pressure on bicep tendon during pronation and supination
Bicipital Myotatic Reflex is testing?
Deep tendon reflex
Mainly testing C5-C6
Does the bicep attach to the humerus?
NO
What is the function of the bicep brachii?
Flexes the shoulder (arm) and elbow (forearm)
What are the characteristics of bicep tendonitis?
Tends to affect the long head of the bicep brachii that lies in the intertubercular groove
Caused by repetitive microtrauma - throwing or using a raquet
Symptoms are tenderness and crackling
What are characteristics of dislocation of the tendon of the long head of bicep brachii?
What are the characteristics of rupturing the tendon of the long head of bicep?
What are the characteristics of fracture- dislocation of the proximal humeral epiphysis?
What is the origin of the brachialis muscle?
Distal half of humerus
Where does the brachialis muscle insert?
It inserts onto the coronoid process and tuberosity of the ulna
What is the function of the coracobrachialis muscle?
It flexes and adducts the shoulder
What is the function of the brachialis muscle?
Flexes the elbow
What is the origin of the coracobrachialis?
The coracoid process
Where does the coracobrachialis insert?
Middle 1/3rd of the humerus
What nerve pierces through the coracobrachialis?
The musculocutaneous nerve passes through the coracobrachialis
What is the origin of the long head of the tricep brachii?
Infraglenoid tubercle
What is the origin of the lateral and medial head of the tricep brachii?
Posterior of the humerus
What is the insertion point of the tricep brachii?
Inserts onto the olecranon process of the ulna
What is the function of the tricep brachii?
Extends the arm
What major artery starts from the inferior border of the teres major?
What is the first branch of the brachial artery?
Deep artery of the arm
The deep artery of the arm accompanies?
The radial nerve
What are some clinical correlations associated with the brachial artery?
What are the important superficial veins of the arm?
Cephalic, Basilic, and Median cubital
What cephalic vein lies in the _________ and passes through the _______ eventually emptying in the ______?
Deltopectoral groove; deltopectoral triangle; axillary vein
The basilic vein lies on the _____ side of the arm and merges with veins accompanying the _____ to form the _____?
Medial; Brachial artery; axillary vein
What median cubital vein is?
An anastamotic connection of the cephalic and basilic vein
The musculocutaneous nerve is from what cord?
Lateral cord of the brachial plexus
The musculocutaneous nerve pierces what muscle?
Coracobrachialis
The musculocutaneous nerve innervates all of the?
Anterior flexors
What are the characteristics of a musculocutaneous nerve injury?
The Radial Nerve originates from the?
Posterior cord of the brachial plexus
The radial nerve passes around the _____ in the ______ with the _____?
Humerus; radial groove; deep artery
The deep branch of the radial nerve innervates?
Supplies forearm muscles and the elbow joint
The superficial branch of the radial nerve supplies?
Cutaneous
Supplies the skin of the dorsum of the hand and digits
What are the characteristics of a radial nerve injury?
Wrist drop sign is indicitive of?
Radial Nerve injury
The median nerve comes from?
The union of medial and lateral cord
The median nerve innervates?
The elbow joint and has no branches in the arm
The ulnar nerve comes from?
The medial cord of the BP
The ulnar nerve pierces what in the middle of the arm?
The medial intermuscular septum
At the distal end the ulnar nerve passes posterior to the ______ and medial to ________ to enter the forearm?
Posterior to the medial epicondyle; medial to olecranon
Does the ulnar nerve have branches in the arm?
NO
What is pronator syndrome?
What is a sign for pronator syndrome?
The Pope’s Sign
What is Cubital Tunnel Syndrome?
What is ulnar nerve injury?
What are the contents of the cubital fossa?
Terminal portion of the brachial artery
Radial and ulnar arteries
Biceps Brachii tendon
Median nerve
Radial nerve branches
What are some common venipuncture locations?
