Muscles Of The Hand Flashcards
What nerve primarily innervates the thenar muscles?
The median nerve.
True or False: The ulnar nerve innervates the majority of the intrinsic muscles of the hand.
True.
Which muscle is innervated by the radial nerve in the hand?
The extensor pollicis longus.
Fill in the blank: The ______ nerve innervates the hypothenar muscles.
ulnar.
What is the primary function of the lumbrical muscles?
To flex the metacarpophalangeal joints and extend the interphalangeal joints.
Which two nerves are responsible for the sensory innervation of the hand?
Median nerve and ulnar nerve.
True or False: The median nerve innervates the adductor pollicis muscle.
False.
What type of joint movement do the interossei muscles facilitate?
Abduction and adduction of the fingers.
Which muscle is NOT innervated by the ulnar nerve?
The flexor pollicis longus.
What is the main role of the dorsal interossei muscles?
To abduct the fingers.
Fill in the blank: The ______ nerve innervates the majority of the flexor muscles in the forearm.
median.
What muscle is responsible for opposition of the thumb?
Opponens pollicis.
Which nerve is responsible for sensory innervation to the skin over the lateral side of the hand?
Median nerve.
True or False: The palmaris brevis muscle is innervated by the median nerve.
False.
What is the action of the palmar interossei muscles?
Adduction of the fingers.
Which muscle is innervated by both the ulnar and median nerves?
Flexor digitorum profundus.
What is the primary function of the flexor digitorum superficialis?
To flex the proximal interphalangeal joints.
Fill in the blank: The ______ nerve is responsible for the innervation of the flexor pollicis brevis (superficial head).
median.
Which muscles are known as the ‘hypothenar muscles’?
Abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi.
What is the innervation of the extensor digitorum muscle?
Radial nerve.
True or False: The median nerve provides innervation to the skin of the palm.
True.
Which muscle assists in flexing the metacarpophalangeal joints while extending the interphalangeal joints?
Lumbricals.
What are the terminal branches of the brachial plexus that innervate the hand?
Median nerve, ulnar nerve, and radial nerve.
Fill in the blank: The ______ nerve supplies the skin over the medial side of the hand.
ulnar.
Which muscles are affected in ulnar nerve palsy?
Hypothenar muscles and interossei muscles.
What is the primary role of the flexor pollicis longus?
To flex the thumb.
