MIX DECK: UPPER LIMB Flashcards
this includes muscle origin, insertion, innervation and action of the muscles in the scapular region
What is the origin of the Teres Major?
Inferior angle and lower part of the lateral border of the scapula
Teres Major is involved in the adduction and medial rotation of the humerus.
What is the insertion point of the Teres Minor?
Greater tubercle of the humerus
Teres Minor functions in lateral rotation and stabilization of the humerus.
What nerve innervates the Infraspinatus?
Suprascapular nerve
Infraspinatus is part of the rotator cuff and aids in lateral rotation of the arm.
What is the function of the Supraspinatus muscle?
Assistance in arm abduction, stabilization of the humerus
Supraspinatus is also innervated by the suprascapular nerve.
What is the origin of the Serratus Anterior?
Lateral parts of the 1st and 8th ribs
Serratus Anterior plays a role in protraction and rotation of the scapula.
Which nerve innervates the Subscapularis?
Upper and lower subscapular nerves
Subscapularis is involved in medial rotation and stabilization of the humerus.
What is the function of the Levator Scapulae?
Elevation of the scapula
The Levator Scapulae is innervated by the anterior rami of C3 and C4 and the dorsal scapular nerve.
What is the insertion of the Rhomboid Major?
Medial end of the scapular nerve
Rhomboid Major assists in retraction and fixation of the scapula on the thoracic wall.
What is the primary function of the Trapezius muscle?
Elevation, depression, and retraction of the scapula
Trapezius is innervated by the spinal accessory nerve and C3 and C4 spinal nerves.
What is the origin of the Pectoralis Major?
Anterior manubrium and body of sternum, anterior costal cartilages 1-6, medial 1/2 anterior clavicle
Pectoralis Major is involved in adduction and medial rotation of the humerus.
Which nerve innervates the Pectoralis Minor?
Medial pectoral nerve
Pectoralis Minor assists in protraction of the scapula.
What is the function of the Deltoid muscle?
Abduction and stabilization of the shoulder joint
The Deltoid is innervated by the axillary nerve.
What is the origin of the Brachialis?
Distal half of the anterior side of the humerus and intermuscular septa
Brachialis primarily functions in flexion of the forearm at the elbow joint.
What is the insertion point of the Biceps Brachii?
Radial tuberosity
Biceps Brachii flexes the forearm at the elbow joint and acts as a supinator.
What is the function of the Triceps Brachii?
Extension of the forearm and elbow joint
Triceps Brachii is innervated by the radial nerve.
What is the origin of the Pronator Quadratus?
Anterior surface of the ulna
Pronator Quadratus is responsible for forearm pronation.
What is the function of the Flexor Pollicis Longus?
Flexion of the phalanges of the thumb
It is innervated by the anterior interosseous nerve.
Which nerve innervates the Flexor Digitorum Superficialis?
Median nerve
This muscle flexes the middle phalanges at proximal interphalangeal joints.
What is the function of the Extensor Digitorum?
Extension of the index, middle, ring and little finger
Extensor Digitorum is innervated by the posterior interosseous nerve.
What is the insertion of the Supinator muscle?
Surface of the proximal third of the radial shaft
Supinator is responsible for forearm supination.
What is the origin of the Thenar Eminence muscles?
Flexor retinaculum and tubercles of trapezium and scaphoid bones
These muscles include Flexor Pollicis Brevis, Abductor Pollicis Brevis, and Opponens Pollicis.
What is the function of the Hypothenar Eminence muscles?
Abduction of the 5th digit and flexion assistance of the proximal phalanx
These muscles include Flexor Digiti Minimi Brevis, Abductor Digiti Minimi, and Opponens Digiti Minimi.
What nerve innervates the Interossei muscles?
Deep branch of ulnar nerve
Interossei assist in the abduction and adduction of the digits.
Fill in the blank: The mnemonic for the thenar muscles is __________.
3 thenar muscles: abductor pollicis brevis, flexor pollicis brevis, Opponens pollicis (+adductor pollicis)
This helps in memorizing the muscles of the thenar eminence.
