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abaxial

Anatomical directional/positional term meaning (further) away from the axis of a structure (usually the axis of a limb) i.e. further laterally/medially from the central axis.

abaxial sesamoid nerve block

The application of a regional nerve block to the lateral and/or medial branch of the digital nerve (Nervus digitalis palmaris/plantaris medialis/lateralis) at the base of the proximal sesamoid bones where the vascular bundles can be palpated (the nerve is located directly palmar/plantar to this bundle).

abdominal cavity

A large space inside the body, which contains most of the organs of the digestive system, the liver, spleen and kidneys. Its cranial boundary is the diaphragm, which separates it from the thoracic cavity. Dorsally it is enclosed by the spinal column and the lower ribs, ventrally by the abdominal muscles, and caudally by the pelvic cavity.

abduction

A term used in functional anatomy describing the movement of a limb out to the side, away from the mediansagittal plane of the body. It is the opposite of adduction.

abductor muscles

Muscles that cause the abduction of a limb.

abrasion

A medical term used to refer to an injury of the skin (epidermis and dermis) that is characterised by a loss of tissue due to friction.

In farriery, abrasion refers to the loss of material due to wear of a horseshoe.

abscess

A cavity formed by a localised accumulation of pus usually caused by a bacterial invasion of the sensitive tissues. Often causes acute pain and can lead to severe lamenesswhen located in the hoof.

abschroten

German specialised term referring to the cleaving of metal using a chisel hardy.

accessory carpal bone

A bone belonging to the carpus that projects form the palmar surface of the joint. It forms the lateral boundary of the carpal tunnel through which the digital flexor tendons and several blood vessels pass. Due to its exposed position directly under the skin, it must be well protected when applying high bandages to above the level of the carpus.

accessory ligament

Both the deep and the superficial flexor tendon (DDFT, SDFT) are supported by an accessory  ligament. The accessory ligament of the DDFT is also known as the carpal or inferior check ligament, it originates from the palmar aspects of the carpus and joins the tendon in the middle of the metacarpus. The accessory ligament of the SDFT is also known as the radial or superior check ligament, it originates from the medio-distal aspect of the radius and joins the tendon just above the level of the carpal joint.

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