What are the characteristics of the skin on the dorsum of the hand?

The skin on the dorsum of the hand is thin and mobile when relaxed, typically hairy (especially in males and on proximal digits). Its looseness aids movement but also increases susceptibility to swelling.

What structures are found in the superficial fascia of the dorsum of the hand?

The superficial fascia contains key neurovascular structures: the dorsal venous arch (a venous network), the superficial radial nerve (supplying lateral dorsum and thumb), and the dorsal cutaneous branch of the ulnar nerve (supplying medial dorsum and medial 1½ digits).

What is the function of the deep fascia on the dorsum of the hand?

The deep fascia is reinforced over the wrist to form the extensor retinaculum, a thick fibrous band that anchors extensor tendons in place as they pass into the hand.

Why is the skin on the dorsum of the hand prone to swelling?

The skin is loose and mobile, which facilitates movement but also allows fluid accumulation, making it more susceptible to swelling compared to tighter skin areas.

Which nerves supply sensation to the dorsum of the hand?

Sensation is supplied by two main nerves: the superficial radial nerve (innervating lateral dorsum and thumb) and the dorsal cutaneous branch of the ulnar nerve (innervating medial dorsum and medial 1½ digits).

What is the dorsal venous arch and what does it connect to?

The dorsal venous arch is a prominent venous network on the hand dorsum that drains blood from this area. It connects to the cephalic and basilic veins for venous drainage of the upper limb.

Dorsum of Hand Anatomy – Skin, Fascia & Venous Arch