ARM Flashcards
includes the muscles origin, insertion, innervation and action of the muscles in the arm
What is the origin of the Brachialis muscle?
Distal half of the anterior side of the humerus and intermuscular septa
This muscle is primarily involved in the flexion of the forearm at the elbow joint.
What is the insertion point of the Brachialis muscle?
Coronoid process and ulnar tuberosity
The insertion allows for effective leverage during forearm flexion.
Which nerves innervate the Brachialis muscle?
Musculocutaneous and radial nerves
These nerves play a crucial role in muscle control and sensation.
What is the primary function of the Brachialis muscle?
Flexion of the forearm at the elbow joint
It is the main flexor of the elbow joint.
What is the origin of the long head of the Biceps Brachii?
Supraglenoid tubercle of the scapula
This origin helps the muscle in various arm movements.
What is the origin of the short head of the Biceps Brachii?
Apex of the coracoid process of the scapula
This head contributes to the muscle’s overall function.
What is the insertion point of the Biceps Brachii?
Radial tuberosity
This insertion aids in the supination of the forearm.
Which nerve innervates the Biceps Brachii?
Musculocutaneous nerve
This nerve is essential for the muscle’s contraction.
What are the functions of the Biceps Brachii?
Flexion of the forearm at the elbow joint, supinator of the forearm, accessory flexor of the arm at the glenohumeral joint
The Biceps Brachii plays multiple roles in arm movement.
What is the origin of the long head of the Triceps Brachii?
Infraglenoid tubercle of the scapula
This origin supports the muscle’s role in elbow extension.
What are the origins of the medial and lateral heads of the Triceps Brachii?
Posterior surface of the humerus
Both heads contribute to the muscle’s strength and function.
What is the insertion point of the Triceps Brachii?
Olecranon
This insertion allows for effective extension of the forearm.
Which nerve innervates the Triceps Brachii?
Radial nerve
This nerve is crucial for the muscle’s contraction and function.
What is the primary function of the Triceps Brachii?
Extension of the forearm and elbow joint
It is the main extensor of the elbow joint.
What mnemonic can be used to remember the muscles in the flexor compartment of the arm?
3 in flexor compartment of the arm: biceps, brachialis, coracobrachialis
This mnemonic aids in recalling key muscles involved in flexion.
