hand

Question 1

compartments of hand and muscles in each

Answer 1

thenar- Abduc pollicis br, FPB, oppones pol

Adductor- Add pol

Central- lumbricles, flex tendons

Hypothenar- Palmaris br, abduc digiti minimi, flex digity minii, oppones digiti minimi

interosseus- palmar + dorsal interossei

Question 2

bands of palmar apponeurosis and what is superficial to it

Answer 2

4/5 longitudinal bands towards the fingers and will attach to skin of 4 medial digits, has longotundinal band at metacarpal pharangeal lvl

-palmaris longus located superficially

Question 3

where does the ulnar nerve split up in teh hand

Answer 3

deep ulnar n is lat to pisiform and superficial ulnar n runs superficial to the peso hamate lig

Question 4

if ulnar n is impinged distal in gunyons canal what would be affected

Answer 4

only deep (cuz superficial goes over)

Question 5

lat and med border of gunyons canal

Answer 5

lat- hook of hamate

med- pisiform bone

Question 6

what is the osseo fibrous tunnel and what is the floor and roof of it

Answer 6

-where the tendons of the palmar aspect run thru

floor- periosteum of th MC and phalangeal bones
roof- collagenous fibers that bridge over the tendons (arcuate and crutiate orientations)

Question 7

what are the 2 layers of the osseofibrous tunnel

Answer 7

visceral synvial sheath around tendons of of FDP, FDS and parietal synovial sheath around whole thing

Question 8

within the 2 layers of the osseofibrous tunnel what is there

Answer 8

vincula- holds artery and nerves

Question 9

what are the 2 types of vincula

Answer 9

vincula brevia- short and at the level of tendons attachment

vincula longa- longer, one phalanx prior to tendons insersion

Question 10

how far does each flexor sheath go (digits 1-5)

Answer 10

FPL and FDM extend to distal pahalanx

• if inflamation is at digit 2,3,4 the inflamation will be isolated at MCPJ

Question 11

Path of ulnar a in hand

Answer 11

lat to ulnar n

• sends deep palmar br thru gunyuns canal
• after it will send superficial arch that meets with superficial radial arch (ulanr supplies 95%)
• common palmar digital arteries of 4 med digitits

Question 12

Path of the radial a in hand (starting from before snuff box)

Answer 12

• before going to snuff box it sends a superficial branch that goes to superficial arch
• main branch goes to snuff box and comes back thru base of 1st metacarpal and makes deep branch arch
• also has 2 branches that go to thumb

Question 13

what makes up dorsal carpal arch

Answer 13

from ulnar and radial arteries we create the dorsal carpal anastemosis

Question 14

palm cutaneous nerves med to lat

Answer 14

superficial ulnar
palmar cut of median
palmar cut of ulnar 
median n
palmar cut of superficial rad (base of thumb)

Question 15

what is dupuytren contracture of palmar fascia

Answer 15

fibrous degen of palmar fascia and aponeurosis with formation of nodular thickenings attached to skin

(mostly bilat)