L10. Hand

Question 1

Answer 1

Question 2

3 Palmar Ligaments:

Answer 2

Question 3

Description + Function of Flexor Retinaculum:

Answer 3

Question 4

Contents of Carpal Tunnel:

Answer 4

Question 5

Carpal Tunnel Syndrome Description + Clinical Test:

Answer 5

Carpal Tunnel Syndrome occurs when pressure increases in Carpal Tunnel and there’s pressure on the Median Nerve. The median nerve provides sensation to the palm side of the thumb and all of the fingers except the little finger.

Clinical Test is the Phalen’s Test, tap on your skin above the median nerve in your wrist. If that light pressure creates a tingling or “pins-and-needles” feeling in your fingers, you might have carpal tunnel syndrome or another form of nerve compression.

Question 6

3 Main Joints of the Hand:

Answer 6

Carpometacarpal Joints:
Only the first Carpometacarpal Joint is mobile, the other four are relatively immobile.

Metacarpophalangeal Joints (knuckles):
Classified as a Condyloid Joint. This type of joint allows for movement in two planes: flexion-extension and abduction-adduction.
While the other MCP joints of the fingers are typically condyloid joints, the first MCP joint of the thumb is an exception as it is a Saddle Joint which is more mobile.

Interphalangeal Joints:
Classified as Hinge Joints, allow for only flexion and extension.

Question 7

What does the Synovial Sheath surround?

Answer 7

Flexor Digitorum Profundus + Flexor Digitorum Superficialis Tendon

Question 8

Dorsal Digital Expansion Hood:

Answer 8

Question 9

Answer 9

Question 10

Cutaneous Innervation of the Hand:

Answer 10

Cutaneous Innervation of the Hand:

Ulnar Nerve: Anterior and Posterior Medial 1.5 Digits

Median Nerve: Anterior Lateral 3.5 Digits and Posterior Tips of Lateral 3.5 Digits

Radial Nerve: Posterior Lateral 3.5 Digits and Half of Anterior 1st Metacarpal