Exam #6_Lab: Hand Flashcards
Where does the palmaris longus insert/ what does the palmaris longus give rise to?
Palmar aponeurosis of the hand
What is the flexor retinaculum?
Layer of deep fascia that binds down the tendons of the long flexor muscles as they pass over the wrist bones
What does the ulnar artery course into the hand with?
Flexor carpi ulnaris tendon
What does the superficial plamar branch of the radial artery course into the hand with?
Flexor carpi radialis tendon
What are the contents of the carpal tunnel?
1) Tendons of the long digital flexors
2) Median nerve
What arch does the ulnar artery form?
Superficial palmar arch
What does the superficial palmar arch anastamose with?
Superficial palmar branch of the radial artery
What are the branches of the superficial palmar arch?
1) Three common palmar digital arteries
2) Radial indicis a.
3) Proper palmar digital a. to 5th digit
What accompanies each common plamar digital artery?
Common plamar digital nerve
Describe the innervation of the fingers via the common palmar digital nerves.
Ulnar
- Medial side of 4
- 5
Median
- Digits 1-3 & 1/2 of 4
What do the common palmar digital arteries anastamose with?
Metacarpal arteries of the deep palmar arch
What artery is the deep palmar arch a branch of?
Radial artery
What are the branches of the common palmar digital arteries & nerves called?
Proper palmar digital arteries & nerves
How many proper palmar digital arteries & nerves are there per common palmar digital artery & nerve?
2x that supply the medial and lateral side of the corresponding digit
What is the artery to the lateral side of the index finger called?
Radial indicis a.
Where does the proper palmar artery to the medial side of the 5th digit originate?
Directly off the superficial arch; there is no common palmar digital artery there
What is the name of the nerve that supplies the thenar muscles?
Recurrent branch of the median nerve (motor)
What muscles arise from the tendon of the flexor digitorum profundus?
Lumbricals
What are the three muscles of the thenar eminence?
1) Abductor pollicis brevis
2) Opponens pollicis m.
3) Flexor pollicis brevis
What artery passes through the abductor pollicis brevis?
Superficial palmar branch of the radial artery
What is the fourth muscle associated with the thumb?
Adductor pollicis m.
- Oblique head
- Transverse head
What are the three hypothenar muscles?
1) Abductor digit minimi
2) Flexor digiti minimi brevis
3) Opponens digiti minimi
Where does the radial artery enter the palm?
Passing through the two heads of the first dorsal interossei m.
What does the radial artery give rise to in the dorsum of the hand?
Deep palmar arch
What is the first major branch of the deep palmar arch?
Princeps pollicis a.
What artery branches off the princeps pollicis artery?
Radialis indicis a.
What are the palmar metacarpal arteries branches of?
Deep palmar arch
What do the palmar metacarpal arteries anastamose with?
common palmar digital arteries from the superficial branch
How many palmar and dorsal interossei muscles are there?
Palmar= 3 Dorsal= 4
7 Total
Where do the tendons of the flexor digitorum superficialis & profundus insert?
Superficialis= middle phalynx
Profundus= distal phalynx
What is the name of the structure that covers the dorsum of each digit?
Extensor hood
