Incidence of Clavicular Rhomboid Fossa in Northeastern Thais: An Anthropological Study

Abstract

The rhomboid fossa of clavicle is used to determine the age and sex in anthropology and forensic sciences. The variant types of rhomboid fossa on inferior surface have been reported in many races except in Thais. This study therefore was aimed at classifying the types of the rhomboid fossa in Northeastern Thais. The identified 476 Northeastern Thais dried clavicles (270 males and 206 females) were observed and recorded for the types of rhomboid fossa. The results showed that Thai-rhomboid fossa could be classified into 4 types: Type 1: smooth; Type 2: flat; Type 3: elevated; and Type 4: depressed, respectively. The incidences of rhomboid fossa were as follows: Type 1: 0.21%; Type 2: 19.75%; Type 3: 76.26%; and Type 4: 3.78%, respectively. Additionally, it was found that the percentage of Type 4 (11.84%) was much greater than that of female (1.94%) compared to other types. This incidence of rhomboid fossa types especially Type 4 may be a basic knowledge to be used in sex identification. The high incidence of rhomboid fossa in both sexes of Northeastern Thai clavicles was Type 3 (elevated type).

Morphology and Anthropometry of Rhomboid Impression of Clavicle and its Clinical Applications – A South Indian Population Study

“…[10] In North-eastern Thais(476 clavicles), the authors observed no side differences and 76.26% of clavicles showed elevated impression which is higher than that of our present study. [17] However, the smooth impression was found to be lower (0.21%) as compared to our study (20%). [17] In a study on 60 clavicles in the region of Maharashtra of India, Type IA impression was observed more commonly in 63.33%.…”

“…[17] However, the smooth impression was found to be lower (0.21%) as compared to our study (20%). [17] In a study on 60 clavicles in the region of Maharashtra of India, Type IA impression was observed more commonly in 63.33%. [18] Rani et al studied 118 adult clavicles of the Indian population and concluded that the Type IIIA (depressed and rough) type impressions were more prevalent (30.97%) and the Type IIIB (depressed and smooth) were least prevalent (1.77%) which correlates with our study of 29% and 1.5% respectively.…”

The influence of biological affinity and sex on morphometric parameters of the clavicle in a South African sample

“…In addition, a number of studies have reported that morphometric parameters of the clavicle vary between population affinities (Akhlaghi, Moradi, & Hajibeygi, ; Alcina, Rissech, Clavero, & Turbón, ; Ishwarkumar, Pillay, Haffajee, & Rennie, ; Králík, Urbanová, & Wagenknechtová, ; McCormick, Stewart, & Greene, ; Murphy, ; Patel, Shah, Merchant, Nirvan, & Shah, ; Spradley & Jantz, ). For example, previous studies have shown that the incidence of rhomboid fossae, a skeletal trait produced by the costoclavicular ligament which connects the first rib to the clavicle, may differ between the sexes and may be influenced by biological or population affinity (Bhat, Asif, Manjegowda, Radhakrishna, & Shivarama, ; Jit & Kaur, ; Kaewma, Sampannang, Tuamsuk, Kanpittaya, & Iamsaard, ; Paraskevas et al, ; Prado et al, ; Rogers, Flournoy, & McCormick, ).…”