Functional Anatomy Of The Hand And Wrist

Question 1

What are the names of the carpal bones in the hand?

Answer 1

Proximal row

• Scaphoid (boat)
• Lunate (moon)
• Triquetral
• Pisiform (sesamoid)

Distal row

• Trapezium (saddle joint)
• Trapezoid
• Capitate
• Hamate (hooked)

Question 2

What is in the gap between the carpal bones?

Answer 2

Ligaments - Ulnocarpal ligaments and Radioulnar ligaments

Question 3

WHy do we have so many muscles in our hands?

Answer 3

• No muscle attatchments
• Intercalated segment - movement diactated by muscles acting distally
• Hand can conform to shape the task required
• Protected from abnormal movements by strong ligaments
• Scaphoid sisceptoble to avascular necrosis because of the retrograde blood supply (blood goes distal to proximal)

Question 4

What are the contents of the capal tunnel?

Answer 4

9 tendons and the median nerve