What is the pulp of the finger?

What is the pulp of the finger?

The pulp of a finger is the fleshy mass on the palmar aspect of the extremity of the finger.

What is finger pulp made of?

The pulp consists of fibrofatty tissue that is stabilized by fibrous septa extending from the dermis to the periosteum of the distal phalanx. The nail complex, or perionych- ium, includes the nail plate, the nail bed, and the surrounding skin on the dorsum of the fingertip (paro- nychium) (Fig. 1).

What is the innervation of the pulp of the fifth finger?

Innervation. Innervation of the pulp is provided by the divisions of the palmar digital nerves. The nerve divides into these terminal branches at the palmar flexion crease of the DIP joint.

What is pulp space?

Pulp spaces of the fingers Are the subcutaneous spaces on the palmar aspect of the tips of the fingers and the thumb. They are filled with subcutaneous fatty tissue that is divided into compartments by the numerous fibrous septa which extend from the skin to the distal phalanx.

What muscles do finger flexion?

Flexion of the fingers is produced by two long muscles, flexor digitorum profundus, and flexor digitorum superficialis. Here’s the deep finger flexor, flexor digitorum profundus. It arises from the anterior and medial surface of the ulna, and from the interosseous membrane.

What makes up the pulp of the finger?

Areolar tissue of the volar pad provides softness of the finger pulp. There are multiple fibrous collagen bands within the pulp ( Fig. 37.3 ). Their purpose is not to create the compartments but rather to adhere the skin to the underlying periosteum.

Where is the distal pulp located in the hand?

Differences in this structure allow one to distinguish between a proximal and a distal pulp. The distal pulp is situated next to the distal interphalangeal (DIP) tuberosity; it is compartmentalized by fibrous septa that originate from the periosteum of the phalangeal tuberosity and insert into the deep dermis.

How does the distal phalangeal bone support the fingertip?

Theses fibrous layers holds the pulp in place to support the distal phalanx. The Nail: acts a a protective plate to the nail bed, and provides support to the fingertip during pincer grasp and its sensate function. The Distal Phalangeal Bone: provide a firm structure for the pulp and nail to surround. Q3. How are fingertip injuries classified?

What makes the skin of the finger so durable?

The skin covering the pulp of the finger is very durable and has a thick epidermis with deep papillary ridges. The thick skin beneath the distal free edge of the nail plate is called the hyponychium. The pulp consists of fibrofatty tissue that is stabilized by fibrous septa extending from the dermis to the periosteum of the distal phalanx.