Anatomy Dissection 11 Flashcards Preview

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Flashcards in Anatomy Dissection 11 Deck (23)
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1
Q

What structure of the anterior forearm thickens distally, firstly as the palmar carpal ligament at the aspect of wrist joint then, distally and deeper as the flexor retinaculum?

A

Antebrachial (deep fascia) of anterior forearm

2
Q

What does the flexor retinaculum attach to laterally and medially?

A

Laterally - scaphoid/trapezoid

Medially - pisiform and hamate

3
Q

What prevents bowstringing of the tendons during flexion, which would reduce muscle efficiency?

A

Flexor retinaculum

4
Q

What distal tendon fuses with and strengthens the flexor retinaculum?

A

Palmaris longus

5
Q

What is the carpal tunnel a combination of?

A

Carpal bones posteriorly and flexor retinaculum anteriorly

6
Q

What is the contents of the carpal tunnel?

A

Long tendons of forearm flexor muscles (FDS, FDP and FPL) and the median nerve

7
Q

In carpal tunnel syndrome what branch of the median nerve is given off proximally to the tunnel and travels superficially to skin of palm therefore sparing sensation to central palm?

A

Palmar cutaneous branch of median nerve

8
Q

Each finger has four neurovascular bundles supplying it - name them

A
  1. Medial palmar
  2. Lateral palmar
  3. Medial dorsal
  4. Lateral dorsal
9
Q

What technique is commonly used to anaesthetise a finger

A

Ring block technique

10
Q

What nerve supplies medial part of palm, little finger and medial half of ring finger?

A

Ulnar nerve

11
Q

What nerve supplies central/lateral palm, medial half of ring finger, middle & index finger and thumb?

A

Median nerve

12
Q

What nerve supplies skin over the base of the thumb?

A

Radial nerve

13
Q

What structures are continuous with the longitudinal digital bands of the palmar aponeurosis?

A

Fibrous digital sheaths

14
Q

What do fibrous digital sheaths attqach to both sides of?

A

Phalanges

15
Q

What is suggested with tenderness in the floor of the anatomical snuff box following trauma?

A

Scaphoid fracture

16
Q

What nerve supplies medial part of dorsum of the hand, little finger and medial half of ring finger?

A

Ulnar nerve

17
Q

What nerve supplies skin over distal phalanges/nail beds of thumb, index finger and middle finger?

A

Median nerve

18
Q

What nerve supplies skin over the snuffbox, lateral part of dorsum of hand and proximal index and middle fingers?

A

Radial nerve

19
Q

What do the lumbricals attach between?

A

FDP tendon and extensor expansion of same digit

20
Q

What spans the anterior aspect of 2nd to 5th MCP joints and then posterior aspect of the 2nd to 5th PIP joints?

A

Lumbricals

21
Q

What is the action of lumbricals?

A

To flex MCP and extend PIP

22
Q

What supplies the medial two and lateral two lumbricals?

A

Medial two - ulnar nerve

Lateral two - median nerve

23
Q

What innervates the interossei?

A

Ulnar nerve