R Criss Helmkamp
Biographic Data
| ID | 3528280 |
|---|---|
| NAME | R Criss Helmkamp |
| GIVEN NAMES | R Criss |
| FAMILY NAME | Helmkamp |
| SIGNATURE | HELMKAMP R C |
| AFFILIATIONS | Purdue University West Lafayette |
| VERIFIED | No |
| TOTAL WORKS | 5 |
| TOTAL CITATIONS | 31 |
| WORKS AS AUTHOR | 5 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1988 |
| LATEST PUBLICATION YEAR | 1992 |
| H-INDEX | 3 |
Reply to Baskerville
Age‐ and sex‐associated variations in the directional asymmetry of rhesus macaque forelimb bones
Several investigators have questioned the significance of handedness as an explanation of directional forelimb asymmetries, yet little has been done to isolate other explanatory factors. In this investigation, we analyze 61 female and 76 male rhesus macaque skeletons for evidence of age‐and/or sex‐associated variations in ten forelimb bone measurements. All significant directional asymmetries are found to favor the right side. Although some of th…
External brain morphology in rhesus macaques (Macaca mulatta)
Endocranial suture closure in rhesus macaques ( Macaca mulatta )
Endocasts from skulls of 330 rhesus monkeys ( Macaca mulatta ) of known age are scored for closure of nine bilateral and three unilateral sutures or segments of sutures. A variety of tests reveals a strong relationship between age and stages of suture closure, although increasingly broad confidence intervals prevent sutures from being very useful for precisely aging older macaques. The order in which endosutures begin to close, as well as that in…
Directional asymmetry in the forelimb of Macaca mulatta
Asymmetry was investigated in the forelimbs of 150 rhesus monkey ( Macaca mulatta ) skeletons using measurements of right and left humerii, radii, ulnae, second metacarpals, and femora. Seven of the ten forelimb dimensions were larger on the right than on the left side. Paired t‐tests revealed that the mean of the right side was significantly larger than that for the left for two measurements of the ulna and two of the humerus. No measurement was…
Age‐ and sex‐associated variations in the directional asymmetry of rhesus macaque forelimb bones
Several investigators have questioned the significance of handedness as an explanation of directional forelimb asymmetries, yet little has been done to isolate other explanatory factors. In this investigation, we analyze 61 female and 76 male rhesus macaque skeletons for evidence of age‐and/or sex‐associated variations in ten forelimb bone measurements. All significant directional asymmetries are found to favor the right side. Although some of th…
Endocranial suture closure in rhesus macaques ( Macaca mulatta )
Endocasts from skulls of 330 rhesus monkeys ( Macaca mulatta ) of known age are scored for closure of nine bilateral and three unilateral sutures or segments of sutures. A variety of tests reveals a strong relationship between age and stages of suture closure, although increasingly broad confidence intervals prevent sutures from being very useful for precisely aging older macaques. The order in which endosutures begin to close, as well as that in…
Directional asymmetry in the forelimb of Macaca mulatta
Asymmetry was investigated in the forelimbs of 150 rhesus monkey ( Macaca mulatta ) skeletons using measurements of right and left humerii, radii, ulnae, second metacarpals, and femora. Seven of the ten forelimb dimensions were larger on the right than on the left side. Paired t‐tests revealed that the mean of the right side was significantly larger than that for the left for two measurements of the ulna and two of the humerus. No measurement was…
Reply to Baskerville
External brain morphology in rhesus macaques (Macaca mulatta)
Directional asymmetry in the forelimb of Macaca mulatta
Asymmetry was investigated in the forelimbs of 150 rhesus monkey ( Macaca mulatta ) skeletons using measurements of right and left humerii, radii, ulnae, second metacarpals, and femora. Seven of the ten forelimb dimensions were larger on the right than on the left side. Paired t‐tests revealed that the mean of the right side was significantly larger than that for the left for two measurements of the ulna and two of the humerus. No measurement was…
Endocranial suture closure in rhesus macaques ( Macaca mulatta )
Endocasts from skulls of 330 rhesus monkeys ( Macaca mulatta ) of known age are scored for closure of nine bilateral and three unilateral sutures or segments of sutures. A variety of tests reveals a strong relationship between age and stages of suture closure, although increasingly broad confidence intervals prevent sutures from being very useful for precisely aging older macaques. The order in which endosutures begin to close, as well as that in…
Age‐ and sex‐associated variations in the directional asymmetry of rhesus macaque forelimb bones
Several investigators have questioned the significance of handedness as an explanation of directional forelimb asymmetries, yet little has been done to isolate other explanatory factors. In this investigation, we analyze 61 female and 76 male rhesus macaque skeletons for evidence of age‐and/or sex‐associated variations in ten forelimb bone measurements. All significant directional asymmetries are found to favor the right side. Although some of th…
External brain morphology in rhesus macaques (Macaca mulatta)
Reply to Baskerville
Anatomy (4 works) · Anatomy (4 works) · Biology (4 works) · Hemispheric Asymmetry in Neuroscience (3 works) · Macaque (3 works) · Morphological variations and asymmetry (3 works) · Neuroscience (3 works) · Primate Behavior and Ecology (3 works) · Forelimb (2 works) · Rhesus macaque (2 works)