PAS 407- The Hand UPDATED ACTUAL Questions and CORRECT Answers
precise contractions and opposable digit allowing grasp-
What is intricate dexterity?
ing and manipulation with great deal of control
proximally: ulna (through wrist joint) and radius
What do the carpal bones articulate with?
distally: metacarpals
scaphoid
What are the carpal bones in the proximal row from lateral lunate
to medial? triquetrum
pisiform
What is the shape of the scaphoid bone? boat shaped
What does it articulate with? articulates with distal radius and carpal bones
What does it serve as an attachment point for? tuberosity attaches to carpal ligament
What is the shape of the lunate bone? moon shaped
What does it articulate with? articulates with triangular disc in neutral hand position
laterally: scaphoid tuberosity and trapezial ridge
What does the carpal ligament attach?
medially: pisiform and hook of hamate
p shape
What is the shape of the pisiform bone?
sits on a separate plane anterior to other carpal bones;
What is unique about it? sesamoid bone floating within tendon of flexor carpi ul-
naris
What nerve does it protect?
protects ulnar nerve
What does it attach to?
attaches to carpal ligament
pyramid
, What is the shape of the triquetrum bone?
small portion articulates with articular disc when in ulnar
deviation
What does it articulate with?
trapezium
What are the carpal bones in the distal row from lateral to trapezoid
medial? capitate
hamate
What is the shape of the trapezium bone? "little table"
What does it form? forms saddle joint with first metacarpal bone
trapezoid shape
What is the shape of the trapezoid bone?
articulates with scaphoid proximally and 2nd metacarpal
What does it articulate with?
distally
What is the capitate bone considered?
keystone of carpal bones because of its central location
and articulations with most of the carpal bones
Why?
What is the most distinctive feature of the hamate bone? hook of hamate
What does the hamate form? forms superior portion of medial wall of carpal tunnel
What does it attach to? serves as attachment point for carpal ligament
What does a scaphoid fracture commonly occur from?
FOOSH (fall on out stretched hand)
What would be indicative of this injury/suflcient to diag-
pain within anatomical snuff box
nose?
compromised surrounding vasculature resulting in avas-
What could happen due to improper healing of the frac-
cular necrosis = osteoarthritis and bone spurs
ture?
, proximally: carpal bones
What do the metacarpal bones articulate with?
distally: phalanges
metacarpal fracture
results from improper punches or punching hard sur-
faces
What is a boxer's fracture?
3rd metacarpal is most vulnerable because of its length
What causes it?
Which metacarpal is most vulnerable and why?
What joint is formed between the phalanges and
condyloid/ellipsoid joint
metacarpals?
flexion, extension, abduction, and adduction
What movements does it allow?
What joint is formed between the phalanges? hinge joint
What movements does it allows? flexion and extension
What movement occurs when flexor and extensor carpi
ulnar deviation or adduction
ulnaris muscles are contracted?
What movement occurs when flexor and extensor carpi
radial deviation or abduction
radialis muscles are contracted?
What type of joint is the radiocarpal joint?
precise contractions and opposable digit allowing grasp-
What is intricate dexterity?
ing and manipulation with great deal of control
proximally: ulna (through wrist joint) and radius
What do the carpal bones articulate with?
distally: metacarpals
scaphoid
What are the carpal bones in the proximal row from lateral lunate
to medial? triquetrum
pisiform
What is the shape of the scaphoid bone? boat shaped
What does it articulate with? articulates with distal radius and carpal bones
What does it serve as an attachment point for? tuberosity attaches to carpal ligament
What is the shape of the lunate bone? moon shaped
What does it articulate with? articulates with triangular disc in neutral hand position
laterally: scaphoid tuberosity and trapezial ridge
What does the carpal ligament attach?
medially: pisiform and hook of hamate
p shape
What is the shape of the pisiform bone?
sits on a separate plane anterior to other carpal bones;
What is unique about it? sesamoid bone floating within tendon of flexor carpi ul-
naris
What nerve does it protect?
protects ulnar nerve
What does it attach to?
attaches to carpal ligament
pyramid
, What is the shape of the triquetrum bone?
small portion articulates with articular disc when in ulnar
deviation
What does it articulate with?
trapezium
What are the carpal bones in the distal row from lateral to trapezoid
medial? capitate
hamate
What is the shape of the trapezium bone? "little table"
What does it form? forms saddle joint with first metacarpal bone
trapezoid shape
What is the shape of the trapezoid bone?
articulates with scaphoid proximally and 2nd metacarpal
What does it articulate with?
distally
What is the capitate bone considered?
keystone of carpal bones because of its central location
and articulations with most of the carpal bones
Why?
What is the most distinctive feature of the hamate bone? hook of hamate
What does the hamate form? forms superior portion of medial wall of carpal tunnel
What does it attach to? serves as attachment point for carpal ligament
What does a scaphoid fracture commonly occur from?
FOOSH (fall on out stretched hand)
What would be indicative of this injury/suflcient to diag-
pain within anatomical snuff box
nose?
compromised surrounding vasculature resulting in avas-
What could happen due to improper healing of the frac-
cular necrosis = osteoarthritis and bone spurs
ture?
, proximally: carpal bones
What do the metacarpal bones articulate with?
distally: phalanges
metacarpal fracture
results from improper punches or punching hard sur-
faces
What is a boxer's fracture?
3rd metacarpal is most vulnerable because of its length
What causes it?
Which metacarpal is most vulnerable and why?
What joint is formed between the phalanges and
condyloid/ellipsoid joint
metacarpals?
flexion, extension, abduction, and adduction
What movements does it allow?
What joint is formed between the phalanges? hinge joint
What movements does it allows? flexion and extension
What movement occurs when flexor and extensor carpi
ulnar deviation or adduction
ulnaris muscles are contracted?
What movement occurs when flexor and extensor carpi
radial deviation or abduction
radialis muscles are contracted?
What type of joint is the radiocarpal joint?
