Lecture 3.2 Flashcards
There are __ carpal bones
___ rows, bridged by flexor retinaculum
Scaphoid is most _______
There are 8carpal bones
2 rows, bridged by flexor retinaculum
scaphoid is most vulnearble
Scapohid and lunate together make contact with the ____
radius
Pisiform is a sesamoid bone
what is a asesamoid bone
develped within a tendon
work as ball bearings
hamate sits distal to the ________
pisiform
True or False:
The piso-hamate ligament conects the pisoform and hamate
true
Fracture of the hamate bone will affect the ___ nerve
ulnar nerve
metacarpals are _____bones
long bones
The first metacarpal is the ____
thumb
Label
The ________ ____ is the most superficial palmar muscle, located in the lateral side
The palmaris brevis is the most superficial palmar muscle, located in the lateral side
Contracture of the plamar fascia - is the thickening and shrinking of _____ _____, typically affecting ring and ling fingers. No know aetiology but thought to be inherited
Contracture of the plamar fascia - is the thickening and shrinking of palmar fascia, typically affecting ring and ling fingers. No know aetiology but thought to be inherited
The flexor retinaculum attaches to what?
Medial: Hook of hamate
& pisiform
Lateral: Trapezium & scaphoid
Carpal tunnel:
Roof:
Floor:
Promial end identified by:
Contents:
Roof: flexor retinaculum
Floor:Carpal bones
Promial end identified by: distal wrist crease
Contents:
- Flexor tendons,
- synovial sheaths
- median nerve
What tructures pass superficial to the carpal tunnel?
Polmarus longus
Ulnar artery / ulnar
superficial branch of radial artery
palmar cutaneous branch of median nerve
consider the FDS and FDP tendons in the synovial sheaths.
Which numbers go where (imagine the corss sectional diagram)
The Flexor carpi radialis lies in the ___ of the carpal tunnel
roof
True or False
There is no extensor retinaculum
False - there is
How many muscles are in the extensor campartment of the forearm?
How many go through the extensor retinaculum?
11
9 go through
(the supinator & bracial radialis dont go past the wrist)
What are the borders of the anatomical snuff box?
what does it contain
Anteriorly: tendons of Abductor pollicis longus (APL) and Extensor pollicis brevis (EPB)
Posteriorly: Extensor pollicis longus
Roof: skin, subcutaneous tissue, cephalic vein, superficial branch of radial nerve
Floor: scafoid, trapezium
contents - RADIAL ARTERY
What are the thenar (thumb) muscles?
abductor pollicis brevis
flexor pollicis brevis
What are the hypothenar muscles?
abductor digiti minimi
flexor digiti minimi
Both arise from dges of flexor retinaculum
and insert into base of proximal phalanx
Lumbricals arise from …
they pass to _____side of digit
Flexor digitorum profundus
they pass to lateral side of digit
Lumbricals flexor the _______ joint
Lumbricals flexor the carpal/metacarpal joint
The intrinsic muscle of the thenar side are:
opponens pollicis
adductor pollciis
he opponens digit minimi (hypothenar muscle) allows one to do _______
opposition
On the palmar side there are __ interossei muslces
On the Dorsal side there are __ interossei muscles
On the palmar side there are 3 interossei muslces (pull the finger together)
On the Dorsal side there are 4 interossei muscles
The median nerve comes through the carpal tunnel then sends the recurrent branch to the _ muscles on the thenar side of the palm
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