Lecture14: Hands And Wrist Flashcards
How many carpal bones are there?
8
Which muscle does not belong in the thenar group?
Adducter Pollicis
What do all the thenar muscles have in their name?
Pollicis
What do all the hypothenar muscles have in their name?
Digiti minimi
How many lumbrical muscles are there?
4 for the medial 4 fingers
What is the Lumbricsl muscles’ action?
They put the hand into writing position
How many Palmar Interosseous muscles are there?
3
What do the Palmar Interosseous muscles do?
They adduct the fingers towards the middle finger (PAD- palmar adduction)
What do the Dorsal Interosseous muscles do?
The 4 of them abduct the fingers away from the middle finger (DAB- dorsal abduction)
What supplies the Thenar muscles?
Median nerve
What supplies the first and second lumbrical muscles?
Median nerve
Why is infection limited in the fascial spaces of the palm?
Due to the loose connected tissue separated by fibrous septa
Where is the the superficial palmar arch?
In the palm of the hand, superficial to the flexor tendons
What does the Superficial palmar branch do?
Supplies the fingers
What does the deep palmar branch do?
Gives branches to the superficial palmar branch
Where is the deep flexor arch?
In the palm of the hand, deep to the flexor tendons
Precisely how many fingers does the superficial palmar arch arterially supply?
Medial 3 1/2
Precisely how many fingers does the radial artery supply?
The lateral 1 1/2 fingers
Which 2 arteries supplies the anterior carpal arch?
Radial and ulnar
What does the anterior carpal arch supply?
Carpal bones
What does the dorsal carpal arch supply?
The 2 dorsal digital arteries
What type of joint is the wrist joint?
Synovial ellipsoid
What is the resulting issue due to wrist sprain?
In-ability to abduct the wrist
