Concave Convex

Question 1

Describe the Open Pack Position and Concave-Convex rule for the GH Joint

Answer 1

Ball and socket = Convex on concave = Opposites
Open Pack is 50 degrees of abduction and 30 degrees of horizontal adduction “think about position for long axis distraction

Question 2

Describe the Open Pack Position and Concave-Convex rule for the Radiohumeral Joint

Answer 2

Concave surface of radial head on convex humeral condyle= Open chain is 90 degrees flexion and 5 degrees supination

Question 3

Describe the Open Pack Position and Concave-Convex rule for the Humeroulnar joint

Answer 3

Open pack is 70 flexion and 10 degrees supination

Although convex on concave here is a notch in way so…

Distaction promotes BOTH flexion and Extension

Distraction with ant glide good for flexion specifically (distal glide)

Question 4

What is the GH capsular Pattern

Answer 4

ER, Abd, IR = Abd Sandwich with Rotation bread

Question 5

Describe the Open Pack Position and Concave-Convex rule for the Proximal raidal ulnar joint

Answer 5

This is convex radial head in a concave ulnar notch so opposites.
Dorsal (post directed) glide on the radius promotes pronation and ventral glide promotes supination
Open pack is 70 degrees of flexion and 35 degrees of supination

Distal joint is opposite and 10 degree supination is open*

Question 6

Describe the Open Pack Position and Concave-Convex rule for the radiocarpal joint

Answer 6

Convex rounded carpal bones on concave radius and ulna so opposites
You know to promote radial deviation you go towards ulnar side (ulnar glide). To promote extension you mob into flexion Palmar glide. Think in opposites.

Open pack is neutral with slight ulnar deviation

Question 7

Describe the Open Pack Position and Concave-Convex rule for the fingers and toes joint

Answer 7

Concave on conved (metacarbal heads (knuckles are convex) so same direction for everything
Thumb flexion and extension is in plane of fingers and still concave rule

Thumb add, abd is the exception with convex rule b/c in perpendicular plane*

Question 8

Describe the Open Pack Position and Concave-Convex rule for the Tibiofemoral joint

Answer 8

Concave tibia plataue on convex femoral condyles so same way
Ant glide for ext and post glide for flexion

Open pack is 25 degrees of flexion (lachmans)

Question 9

Describe the Open Pack Position and Concave-Convex rule for the Talocrural joint

Answer 9

Open pack is 10 degrees pf and midway between eversion and inversion
Convex talus on concave mortis

Ant glide for pf
Dorsal glude for DF
Visualize this one

Question 10

Subtalar joint

Answer 10

Open pack is the midway point. Think in opposites
Convex calcaneus on concave talus
Medial glide promotes eversion and vice versa

Question 11

Describe the Open Pack Position and Concave-Convex rule for the iliofemoral (hip) joint

Answer 11

Open pack is where you would place for long axis distraction. 30 flexion 30 abd and slight ER. Same rules as shoulder for mobs