Axial to pectoral
This muscle contracts when you shrug your shoulders to say "I dont know"
What is the trapezius?
What muscle flexes, abducts, and extends the shoulder?
What is the deltoid?
This group all crosses the olecranon process of ulna and is innervated by the radial n.
What is triceps brachii (long, lateral, and medial heads)
This muscle runs from the medial epicondyle of the humerus to the palmar surface of metacarpals II and III and helps flex the wrist and abduct the hand
What is Flexor Carpi Radialis?
This muscle is engaged when you flex your elbow while holding a hammer in a neutral (thumb-up) grip
What is the brachioradialis?
When you tilt your head to one side while holding a phone between your ear and shoulder, this muscle helps elevate the scapula.
What is the levator scapulae?
This muscle initiates the movement of abducting before the deltoid takes over
During a pull-up, you are activating these muscles on the anterior side.
What is the biceps brachii long and short heads?
This small, thin muscle lies between the flexor carpi radialis and flexor carpi ulnaris and is often absent in some people. It assists with wrist flexion
What is the palmaris longus?
This muscle allows you to straighten all four fingers, then release your hand from typing on a keyboard.
What is the Extensor digitorum?
These muscles retract the scapula, pulling the shoulder blades toward the midline, and are located deep to the trapezius.
What are the rhomboid minor and major?
The only muscle from the pectoral girdle to the humerus that has an insertion of the lesser tubercle of the humerus
What is the subscapularis?
This muscle crosses both the shoulder and elbow joints, and is engaged while carrying a purse on your arm.
What is the biceps brachii long head?
This muscle crosses both the elbow and wrist joints, is innervated by the median nerve, flexes the elbow, and pronates the forearm
What is the pronator teres?
This muscle is engaged with the finger you stick out when drinking tea.
What is the extensor digiti minimi?
Paralysis of this muscle due to long thoracic nerve injury causes a "winged scapula."
What is serratus anterior?
This muscle originates from the inferior angle of the capsule to the crest of the lesser tubercle of the humerus and is engaged when you put your arm behind your back to tuck in a shirt.
What is the teres major?
This muscle originates at the distal anterior humerus to the ulnar tuberosity; the coronoid process of the ulna, and is innervated by the musculocutaneous n.
What is brachialis?
This muscle originates from the medial epicondyle of the humerus to the palmar surface of the middle phalanges. Primarily flexes the proximal interphalangeal joints, but also assists in wrist flexion.
What is flexor digitorum superficialis?
This muscle contracts to stabilize your elbow when you push open a heavy door.
What is anconeus?
This muscle originates from ribs 3-5 and inserts on the coracoid process of the scapula. It stabilizes the scapula by drawing it anteriorly and inferiorly against the thoracic wall.
What is pectoralis minor?
A patient has difficulty laterally rotating their arm and maintaining shoulder joint stability. MRI shows damage to the posterior rotator cuff. Which muscles are most likely affected, and what part of the humerus do they insert into?
What are the infraspinatus and teres minor, inserting on the greater tubercle of the humerus?
This muscle helps you keep a grocery bag close to your body as you carry it, by flexing and adducting the arm.
What is coracobrachialis?
What is Flexor Carpi Ulnaris?
This muscle helps when you extend your wrist while pushing down on the pinky side of your palm. (karate chopping)
What is the extensor carpi ulnaris?