Palmar Musculature | The Hypothenar Muscles

The video tutorial explains the differences between extrinsic and intrinsic muscles of the hand. It focuses on intrinsic muscles, specifically the thenar and hypothenar muscles. The thenar muscles control thumb movements and are innervated by the median nerve. The hypothenar muscles, which include the abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi, control the pinky and are innervated by the ulnar nerve. The video concludes with a summary and a preview of the next topic on intrinsic hand muscles.

What is the primary function of the thenar muscles?

• Control movements of the pinky finger

• Control movements of the thumb

• Extend the fingers

• Flex the wrist

Which nerve innervates the hypothenar muscles?

• Axillary nerve

• Median nerve

• Radial nerve

• Ulnar nerve

What is the main action of the abductor digiti minimi?

• Flex the 5th digit

• Abduct the 5th digit

• Oppose the 5th digit

• Extend the 5th digit

Where does the flexor digiti minimi brevis originate?

• Pisiform bone

• Trapezium bone

• Scaphoid bone

• Hamate bone

What is the function of the opponens digiti minimi?

• Abduct the 5th digit

• Extend the 5th digit

• Flex the 5th digit

• Oppose the 5th digit

Which muscle is located most medially on the palmar surface of the hand?

• Opponens digiti minimi

• Flexor digiti minimi brevis

• Abductor digiti minimi

• Adductor pollicis

What is the innervation of the thenar muscles?

• Musculocutaneous nerve

• Median nerve

• Radial nerve

• Ulnar nerve