Anatomy

Question 1

Borders and contents of “Interscalene triangle”

This is also the area of thoracic outlet

Answer 1

Borders:
A: Anterior Scalene muscle
P: Middle Scalene muscle
Floor: First Rib
Roof: Prevertebral fascia and clacivle

Contents:
Brachial plexus trunks
Subclavian artery

Subclavian vein is not in this space, it runs in front of anterior scalene

Question 2

Borders and contents of “Costoclavicular space”

Answer 2

Borders:
Clavicle and subclavius muscle (anteriorly)
First rib and scalene muscles (posteriorly)
Costoclavicular ligament (medial)
Upper scapular border (lateral)

Contents:
Brachial plexus divisions
Subclavian artery and vein

Question 3

Borders and contents of “Retropectoralis minor space”

Answer 3

Borders:
Coracoid (superior)
Pec Minor (anterior)
Ribs 2-4 (posterior)

Contents:
Brachial plexus cords
Axillary artery and vein

Question 4

Contents of the Greater sciatic notch (5 things)

Answer 4

Piriformis
Internal pudendal nerve
Nerves to obturator internus and Quadratus femoris
Gluteal vessels and nerves (superior and inferior)
Sciatic nerve (and posterior femoral cutaneous)

Nerves:
SupGlut
InfGlut
Sciatic
Posterior femoral cutaneous
Internal pudendal
Obturator internus
Quadratus femoris

Question 5

Pectineus (Origin, Insertion, Innervation, Arterial)

Answer 5

O: Middle of superior pubis
I: Pectineal line of femur (between iliacus anterior and adductor brevis posterior)
I: L2,3,4 via Femoral and Obturator nerves
A: Medial femoral circumflex and Obturator

Question 6

How to differentiate between Ulnar nerve and C8-T1 radiculopathy

Answer 6

Ulnar nerve
Sensation to medial border of the hand, Motor to most intrinsics

Medial antebrachial cutaneous nerve (medial cord from C8 and T1) does sensation to medial forearm
LOAF muscles are done by Median nerve via C8 and T1

Question 7

6 radiographic lines in Acetabular fractures

Answer 7

IlioPectineal line (anterior column)
IlioIschial line (posterior column)
Teardrop (cotyloid fossa and quadrilateral plate)
Roof (superior acetablum)
Anterior rim (more medial line on AP XR)
Posterior rim (more lateral line on AP XR)

Question 8

Borders and contents of the Cubital fossa

Answer 8

Contents: Biceps tendon (lateral), Brachial artery, Median nerve (medial)

Lateral border: BrachioRadialis
Medial border: Pronator Teres
Proximal border: Distal humerus

Question 9

Flexor pulleys of the thumb

Answer 9

A2 - Distal end of proximal phalanx
Oblique - Proximal end of proximal phalanx
Av - (variable pulley)
A1 - Distal end of Metacarpal (over volar plate)

Question 10

Layers of the foot

Answer 10

From the floor up:

1. AFA (Abductor H, Flexor D, Abductor DM)
2. 222 (2 Tendons, 2 muscles, 2NV bundles: FHL, FDL, Lumbricals, QP, Medial and Lateral plantar NVs)
3. FAF (FHB, ADductor H, FDMB)
4. Interossei (dorsal and plantar)
5. EHB, EDB (dorsal compartment)

so AFA222FAF (remember that B comes before D, so ABductors first, then ADductors. The interossei and the dorsal layers you just have to remember)

Question 11

Blood supply to the talus

Answer 11

Medial Talar artery
Medial Recurrent Tarsal artery
Deltoid artery
Tarsal canal artery
Tarsal sinus artery