Metacarpal muscles

This tutorial covers the intrinsic muscles of the hand, focusing on the metacarpal muscles, which include the Palmar Interossei, Dorsal Interossei, and Lumbricals. Each muscle group is discussed in terms of its origin, insertion, and innervation. The Palmar Interossei are highlighted for their role in finger movement, while the Dorsal Interossei are noted for their strength and location. The Lumbricals are unique for originating from tendons rather than bones. The tutorial concludes with a call to further learning through practice and related resources.

What defines intrinsic muscles of the hand?

• They are only found in the foot.

• They have attachment points outside the hand.

• They have attachment points within the bones of the hand.

• They are not connected to any bones.

Which group of muscles is located on the lateral side of the hand in line with the thumb?

• Hypothenar muscles

• Palmer interossei

• Thenar muscles

• Dorsal interossei

Where does the first Palmer interosseous muscle originate?

• Ulnar side of the fifth metacarpal

• Radial side of the second metacarpal

• Ulnar side of the second metacarpal

• Radial side of the fourth metacarpal

What is the nerve supply for the Palmer interossei muscles?

• Superficial branch of the ulnar nerve

• Median nerve

• Radial nerve

• Deep branch of the ulnar nerve

How many dorsal interossei muscles are there?

• Two

• Five

• Three

• Four

Which dorsal interosseous muscle is the largest and strongest?

• First

• Fourth

• Second

• Third

What is unique about the origin of the lumbricals?

• They originate from ligaments.

• They originate from tendons.

• They originate from bones.

• They originate from skin.

Which nerve supplies the 1st and 2nd lumbricals?

• Median nerve

• Radial nerve

• Axillary nerve

• Ulnar nerve

What is the insertion point for the lumbricals?

• Carpal bones

• Metacarpal bones

• Dorsal aponeurosis

• Base of the proximal phalanx

What are the three ways to continue learning about metacarpal muscles at Kenhub?

• Start training, read related articles, check the Atlas

• Watch more videos, read books, attend seminars

• Practice exercises, take quizzes, join forums

• Attend workshops, join study groups, read journals