Anna Maria Kubicka1, Przemysław Lubiatowski2,3, Jan Dawid Długosz3, Leszek Romanowski2, Janusz Piontek1. 1. Department of Human Evolutionary Biology, Institute of Anthropology, Adam Mickiewicz University in Poznań, Poland. 2. Department of Traumatology, Orthopaedics and Hand Surgery, University of Medical Sciences in Poznań, Poland. 3. Rehasport Clinic, Poznań, Poland.
Abstract
OBJECTIVES: Degrees of upper-limb bilateral asymmetry reflect habitual behavior and activity levels throughout life in human populations. The shoulder joint facilitates a wide range of combined motions due to the simultaneous motion of all three bones: clavicle, scapula, and humerus. Accordingly, we used three-dimensional geometric morphometrics to analyze shape differences in the glenoid cavity and linear morphometrics to obtain the degree of directional asymmetry in a medieval population. METHODS: To calculate directional asymmetry, clavicles, humeri, and scapulae from 100 individuals (50 females, 50 males) were measured. Landmarks and semilandmarks were placed within a three-dimensional reconstruction of the glenoid cavity for analysis of shape differences between sides of the body within sexes. RESULTS: Linear morphometrics showed significant directional asymmetry in both sexes in all bones. Geometric morphometrics revealed significant shape differences of the glenoid cavity between sides of the body in females but not in males. Both indicators of directional asymmetry (%DA and %AA) did not show significant differences between sexes. PLS analysis revealed a significant correlation between glenoid shape and two humeral head diameters only in females on the left side of the body. CONCLUSIONS: The studied population, perhaps due to a high level of activity, exhibited slightly greater upper-limb bone bilateral asymmetry than other agricultural populations. Results suggest that the upper limbs were involved in similar activity patterns in both sexes but were characterized by different habitual behaviors. To obtain comprehensive results, studies should be based on sophisticated methods such as geometric morphometrics as well as standard measurements. Am. J. Hum. Biol. 28:817-824, 2016.
OBJECTIVES: Degrees of upper-limb bilateral asymmetry reflect habitual behavior and activity levels throughout life in human populations. The shoulder joint facilitates a wide range of combined motions due to the simultaneous motion of all three bones: clavicle, scapula, and humerus. Accordingly, we used three-dimensional geometric morphometrics to analyze shape differences in the glenoid cavity and linear morphometrics to obtain the degree of directional asymmetry in a medieval population. METHODS: To calculate directional asymmetry, clavicles, humeri, and scapulae from 100 individuals (50 females, 50 males) were measured. Landmarks and semilandmarks were placed within a three-dimensional reconstruction of the glenoid cavity for analysis of shape differences between sides of the body within sexes. RESULTS: Linear morphometrics showed significant directional asymmetry in both sexes in all bones. Geometric morphometrics revealed significant shape differences of the glenoid cavity between sides of the body in females but not in males. Both indicators of directional asymmetry (%DA and %AA) did not show significant differences between sexes. PLS analysis revealed a significant correlation between glenoid shape and two humeral head diameters only in females on the left side of the body. CONCLUSIONS: The studied population, perhaps due to a high level of activity, exhibited slightly greater upper-limb bone bilateral asymmetry than other agricultural populations. Results suggest that the upper limbs were involved in similar activity patterns in both sexes but were characterized by different habitual behaviors. To obtain comprehensive results, studies should be based on sophisticated methods such as geometric morphometrics as well as standard measurements. Am. J. Hum. Biol. 28:817-824, 2016.
Authors: Bartosz Jan Musielak; Milud Shadi; Anna Maria Kubicka; Paweł Koczewski; Michał Rychlik; Pirunthi Premakumaran; Marek Jóźwiak Journal: J Child Orthop Date: 2020-10-01 Impact factor: 1.548
Authors: Bartosz Jan Musielak; Anna Maria Kubicka; Łukasz Woźniak; Marek Jóźwiak; Raymond W Liu Journal: Clin Orthop Relat Res Date: 2021-08-01 Impact factor: 4.755
Authors: Bartosz Musielak; Anna Maria Kubicka; Michał Rychlik; Jarosław Czubak; Adam Czwojdziński; Andrzej Grzegorzewski; Marek Jóźwiak Journal: PeerJ Date: 2019-02-20 Impact factor: 2.984
Authors: Anna Maria Kubicka; Antoine Balzeau; Jakub Kosicki; Wioletta Nowaczewska; Elżbieta Haduch; Anna Spinek; Janusz Piontek Journal: Sci Rep Date: 2022-03-18 Impact factor: 4.996