Musculoskeletal, Skin, and CT - First Aid Flashcards Preview

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Flashcards in Musculoskeletal, Skin, and CT - First Aid Deck (286)
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1

Tight junction (aka zonula occludens)

prevents paracellular movement of solutes; composed of claudins and occludins

2

Adherens junction (aka zonula adherens)

below tight junction; forms belt connecting actin cytoskeletons of adjacent cells with cadherins

3

Cadherins are...

Ca2+ dependent adhesion proteins.

4

Loss of E-cadherin promotes...

metastasis.

5

Desmosome (macula adherens)

structural support via keratin interactions

6

Autoantibodies to the desmosome cause...

pemphigus vulgaris.

7

Gap junction

channel proteins called connexons permit electrical and chemical communication between cells

8

Integrins

membrane proteins that maintain the integrity of basolateral membrane by binding to collagen and laminin in the basement membrane

9

Hemidesmosome

connects keratin in basal cells to the underlying BM

10

Autoantibodies to the hemidesmosome leads to...

bullous pemphigoid (hemidesmosomes are down "bullo")

11

Anterior drawer sign tests for...

ACL injury.

12

Posterior drawer sign tests for...

PCL injury.

13

Valgus stress (abduction) tests for....

MCL injury.

14

Varus stress tests for (adduction)....

LCL injury.

15

McMurray test

pain on external rotation = medial meniscus pain on internal rotation = lateral meniscus

16

Unhappy Triad

injury due to lateral force applied to planted leg; consists of damage to ACL, MCL and medial meniscus (or lateral meniscus)

17

Pudendal nerve block is given....

to relieve the pain of delivery into the ischial spine.

18

Rotator Cuff Muscles

Supraspinatus Infraspinatus Teres minor Subscapularis

19

Supraspinatus

-suprascapular nerve -abducts arm initially -most common rotator cuff injury

20

Infraspinatus

-suprascapular nerve -laterally rotates arm -pitching injury

21

Teres minor

-axillary nerve -adducts and laterally rotates arm

22

Subscapularis

-subscapular nerve -medially rotates and adducts arm

23

The most commonly fractured carpal bone is...

the scaphoid bone and it is prone to avascular necrosis due to retrograde blood supply. It can be palpated in the anatomical snuff box.

24

Dislocation of the lunate may cause...

acute carpal tunnel.

25

A fall on an outstretched hand that damages the hook of hamate can cause...

ulnar nerve injury.

26

Carpal Tunnel Syndrome

entrapment of median nerve leading to parestesia, pain and numbness

27

Guyon Canal Syndrome

compression of the ulnar nerve classically seen in cyclists

28

Erb Palsy is an injury of the...

upper trunk caused by lateral traction on infant's neck during delivery or trauma in adults.

29

Erb Palsy Muscle/Functional Deficits

Deltoid/Supraspinatus - abduction (arm hangs by side) Infraspinatus - lateral rotation (arm is medially rotated) Biceps brachii - flexion, supination (arm extended and pronated)

30

Klumpke Palsy is an injury of the....

lower trunk due to upward force on infant arm during delivery or adult trauma.