Muscles Flashcards
How many muscles are found in total?
8
How many layers are there and how many muscles are there per layer?
1st- 4
2nd- 1
3rd- 2
4th-1
What is the origin of all the muscles in the 1st layer?
Medial Epicondyle of Humerus
Pronator Teres: Layer, Origin and Insertion
1st
Has 2nd head of origin from ulna
Inserts on Radius mid-shaft
Flexor Carpi Radialis Muscle: Layer, Pathway and Insertion
1st
Goes through split in flexor retinaculum
Inserts on 2nd and 3rd metacarpal
Palmaris Longus Muscle: Insertion and Uniqueness
Inserts into Flexor Retinaculum and Palmar Aponeurosis
Absent in about 13% of sides (as in left and right sides of body)
Flexor Carpi Ulnaris Muscle: Layer, Partial Origin, Innervation and Insertion
1st
Has 2nd head of origin from ulna
Innervated by Ulnar Nerve
Inserts on Pisiform
Flexor Digitorum Superficialis Muscle: Layer, Origin and Insertion
2nd
Origins (2): Medial Epicondyle of Humerus, Radius
Insertion: Middle Phalanges of 4 fingers
Flexor Pollicis Longus Muscle: Origin and Insertion
Origin: From anterior surface of radius and interosseous membrane
Insertion: On distal phalanx of thumb
Flexor Digitorum Profundus Muscle: Layer, Origin, Innervation and Insertion
3rd
Origin: From the posterior and medial surface of ulna
Dual Innervation by median and ulnar nerves
Insertion: Distal phalanges of 4 fingers
Pronator Quatrus Muscle:Layer, Location, Origin and Insertion
4th
Transversely Oriented muscle just above the wrist
Origin: from ulna
Insertion: Radius
What are the 4 muscles of the 1st layer?
Pronator Teres
Flexor Carpi Radialis
Palmaris Longus
Flexor Carpi Ulnaris
What are the muscles of the 2nd and 4th layers?
2nd: Flexor Digitorum Superficialis
4th: Pronator Quadratus Muscle
What are the muscles of the 3rd layer?
Flexor Pollicis Longus Muscle
Flexor Digitorum Profundus Muscle
