Original scientific paper

Radiographic visualization of the metacarpus and phalanges in the impala (Aepyceros melampus)

Mohamed Mostafa
Lee Martin Koma
Osman Ssengoba

Abstract

Radiographic and anatomic studies of the metacarpus and phalanges were evaluated in 10 thoracic limbs of the impala (Aepyceros melampus). The metacarpi and phalanges appeared strong and smaller in both size and mass. The fused Mc3/4 appeared longer, rounded, smoother and had a flat palmar surface. The small metacarpal bones (Mc2 and Mc5) were developed and situated on the palmar aspects of the fused Mc3/4. Impala have two digits; each digit has three phalanges (ph I, ph II, ph III) and three sesamoid bones. The two proximal sesamoid bones were elongated. The distal sesamoid bone was quadrilateral in shape. Ph I and p II were much shorter and slimmer. ph III was uniquely triangular in shape. Impala possess a radiographic peculiarity; in the latero-medial radiographic view the dorsal cortex of fused Mc3/4 was thicker than the palmar. The distal epiphysis appeared rounded. The lateral and medial digits were superimposed. In the dorso-palmar view, ph I, ph II, and ph III appeared symmetrical. The proximal and distal sesamoid bones were superimposed. ph III was triangular, with numerous vascular channels. The slim, graceful legs of the impala with narrow and shorter distal segments and reduced weight of the metacarpus and phalanges may represent a distinctive structural modification necessary to facilitate the speedy movement of the impala.

Keywords

radiology; anatomy; metacarpus; phalanges; impala

Hrčak ID:

5087

URI

https://hrcak.srce.hr/5087

Publication date:

20.2.2006.

Visits: 2.250 *