Proper palmar digital arteries

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Proper palmar digital arteries
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Palm of left hand, showing position of skin creases and bones, and surface markings for the volar arches. Only the proximal origin parts of the proper palmar digital arteries are shown.
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Lateral aspect of finger, with artery labeled a proper volar digital artery.
Details
Source common palmar digital arteries
Vein palmar digital veins
Supplies fingers
Identifiers
Latin Arteriae digitales palmares propriae,
arteriae digitales volares propriae
TA A12.2.09.058
FMA 70804
Anatomical terminology

The proper palmar digital arteries travel along the sides of the phalanges (along the contiguous sides of the index, middle, ring, and little fingers), each artery lying just below (dorsal to) its corresponding digital nerve.

Finger organ of manipulation and sensation found in the hands of humans and other primates

A finger is a limb of the human body and a type of digit, an organ of manipulation and sensation found in the hands of humans and other primates. Normally humans have five digits, the bones of which are termed phalanges, on each hand, although some people have more or fewer than five due to congenital disorders such as polydactyly or oligodactyly, or accidental or medical amputations. The first digit is the thumb, followed by index finger, middle finger, ring finger, and little finger or pinky. According to different definitions, the thumb can be called a finger, or not.

Dorsal digital nerves of ulnar nerve

Dorsal digital nerves of ulnar nerve are branches on the dorsum of the hand. The dorsal branch of the ulnar nerve divides into two dorsal digital branches; one supplies the ulnar side of the little finger; the other, the adjacent sides of the little and ring fingers. It also sends a twig to join that given by the superficial branch of the radial nerve for the adjoining sides of the middle and ring fingers, and assists in supplying them.

Contents

Alternative names for these arteries are: [1] proper volar digital arteries, [2] collateral digital arteries, [3] arteriae digitales palmares propriae, [4] or aa. digitales volares propriae. [5]

They anastomose freely in the subcutaneous tissue of the finger tips and by smaller branches near the interphalangeal joints.

Subcutaneous tissue lowermost layer of the integumentary system in vertebrates

The subcutaneous tissue, also called the hypodermis, hypoderm, subcutis, or superficial fascia, is the lowermost layer of the integumentary system in vertebrates. The types of cells found in the hypodermis are fibroblasts, adipose cells, and macrophages. The hypodermis is derived from the mesoderm, but unlike the dermis, it is not derived from the dermatome region of the mesoderm. In arthropods, the hypodermis is an epidermal layer of cells that secretes the chitinous cuticle. The term also refers to a layer of cells lying immediately below the epidermis of plants.

Each also gives off a couple of dorsal branches which anastomose with the dorsal digital arteries, and supply the soft parts on the back of the second and third phalanges, including the matrix of the fingernail.

Dorsal digital arteries arise from the bifurcation of dorsal metacarpal arteries. They travel along the sides and dorsal aspects of the phalanges of the middle finger, ring finger, and little finger. They communicate with the proper palmar digital arteries.

The proper palmar digital artery for the medial side of the little finger arises directly from the ulnar artery deep to the palmaris brevis muscle, but the rest arise from the common palmar digital arteries.

Little finger smallest finger of the human hand

The little finger, or pinky finger, also known as the fifth digit, or pinkie, is the most ulnar and smallest finger of the human hand, opposite the thumb, and next to the ring finger.

Ulnar artery Artery of the forearm

The ulnar artery is the main blood vessel, with oxygenated blood, of the medial aspect of the forearm. It arises from the brachial artery and terminates in the superficial palmar arch, which joins with the superficial branch of the radial artery. It is palpable on the anterior and medial aspect of the wrist.

Common palmar digital arteries

Three common palmar digital arteries arise from the convexity of the superficial palmar arch and proceed distally on the second, third, and fourth lumbricales muscles.

See also

Superficial palmar arch

The superficial palmar arch is formed predominantly by the ulnar artery, with a contribution from the superficial palmar branch of the radial artery. However, in some individuals the contribution from the radial artery might be absent, and instead anastomoses with either the princeps pollicis artery, the radialis indicis artery, or the median artery, the former two of which are branches from the radial artery.

Proper palmar digital nerves of median nerve

In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. Immediately after emerging from under the transverse carpal ligament the median nerve becomes enlarged and flattened and splits into a smaller, lateral, and a larger, medial portion.

Footnotes and references

  1. ↑ Physiology of adult Homo sapiens - Systemic blood and lymph circulation (angiology)
  2. ↑ Palmar and volar may be used synonymously, but volar is less common.
  3. ↑ Thus called because they run alongside (collateral to) the finger bones.
  4. ↑ This is the official and international Latin term as defined by the Terminologia Anatomica (TA), but in English speaking countries and especially the US, proper palmar digital arteries is more commonly used.
  5. ↑ Again, palmar and volar may be used synonymously, but aa. digitales volares propriae does not occur in the TA, and can therefore be considered deprecated.

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The radialis indicis artery is a branch of the radial artery that provides blood to the index finger.

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Common palmar digital nerves of median nerve

In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. Immediately after emerging from under the transverse carpal ligament the median nerve becomes enlarged and flattened and splits into a smaller, lateral, and a larger, medial portion.

Extrinsic extensor muscles of the hand

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