Musculi interossei palmares

The video tutorial explains the Musculi Interossei Palmaris, a group of three muscles located in the palms of the hand. These muscles originate from the lateral surfaces of the metacarpal bones and insert at the dorsal aponeurosis. They are responsible for the adduction of the little, ring, and index fingers towards the middle finger. The tutorial also highlights that there is no interossei palmaris muscle on the middle finger, where the ramus per fundus of the ulnar nerve takes over. The muscles also aid in flexion and extension of specific joints.

What is the primary orientation of the Musculi Interossei Palmaris muscles?

• Towards the wrist

• Towards the middle finger

• Towards the little finger

• Towards the thumb

Which metacarpal bone does the first interossei muscle originate from?

• First metacarpal

• Fourth metacarpal

• Second metacarpal

• Third metacarpal

What replaces the interossei palmaris muscle on the middle finger?

• Radial nerve

• Flexor tendons

• Median nerve

• Ramus per fundus of the ulnar nerve

What is the main function of the Musculi Interossei Palmaris?

• Adduction of the little, ring, and index fingers

• Abduction of the fingers

• Extension of the thumb

• Flexion of the wrist

Which joints are involved in the additional functions of the Musculi Interossei Palmaris?

• Carpal joints

• Metacarpophalangeal and interphalangeal joints

• Elbow joint

• Shoulder joint