Joel A Vilensky
Biographic Data
| ID | 108995 |
|---|---|
| NAME | Joel A Vilensky |
| GIVEN NAMES | Joel A |
| FAMILY NAME | Vilensky |
| SIGNATURE | VILENSKY J A |
| AFFILIATIONS | Indiana University Fort Wayne |
| ORCID | 0000-0002-2206-6524 |
| VERIFIED | Yes |
| TOTAL WORKS | 18 |
| TOTAL CITATIONS | 95 |
| AUTHOR COUNT | 18 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1978 |
| LATEST PUBLICATION YEAR | 2011 |
| H-INDEX | 8 |
Medical imaging of normal and pathologic anatomy
Resource added for the Diagnostic Medical Sonography program 105262 and Radiography 105261 program.
Situs Inversus
Lesions of the Precentral Gyrus in Nonhuman Primates
Squirrel monkey locomotion on an inclined treadmill
Angular displacement patterns of leading and trailing limb joints during galloping in monkeys
The movement patterns of the joints of the right hind limbs and forelimbs of four vervet and one squirrel monkey were compared during right‐ and left‐lead gallops. Although the overall displacement patterns were similar under both conditions, comparisons of the inflection points in the curves yielded consistent differences in the joints at various phases in the cycle. Some of these differences appear to reflect differing mechanical conditions, wh…
Effects of growth and speed on hindlimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Hip, knee, and ankle joint displacement patterns are compared across both age and speed for five immature vervet monkeys sampled approximately every 6 months over a 3 year period. The analysis indicated that, as a group, the animals displayed no consistent changes in joint patterns as they grew. However, individual animals showed consistent patterns. There were also no consistent effects of size across animals at the walk–gallop transition. This …
Effects of speed on forelimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Shoulder, elbow and wrist joint angular displacement patterns were analyzed for five vervet monkeys across increasing speed. Within symmetrical gaits, the peak positions of the pattern for each joint tended to decrease with increasing speed as did the yield angle of the elbow (more “yielding”). Across the walk(run)‐gallop transition there were no notable changes in the displacement patterns, but there was a consistent decrease in the range of elb…
Effects of size on vervet ( Cercopithecus aethiops ) gait parameters
Changes in the values of certain locomotor parameters were analyzed over a range of speeds for five immature vervet monkeys sampled at 6 month intervals over approximately a 3 year period. Lateral and diagonal sequence walking gaits and transverse and rotary gallops were commonly used. The monkeys switched from walking to galloping at long cycle durations for their mass, although, as a group, their transition speeds were in agreement with data fr…
Early development of locomotor behavior in vervet monkeys
The locomotor development of three vervet infants across approximately the first 2 months of life is described. Fairly normal‐looking walking movements (as compared to adults) were seen in all the animals by approximately 1 month of age and galloping was observed by 2 months. Early locomotor footfall patterns were often aberrant and bounding‐type gaits were sometimes exhibited. Most of the symmetrical gaits observed were classifiable as lateral s…
Primate Locomotion
Infrastructures are material forms that allow for the possibility of exchange over space. They are the physical networks through which goods, ideas, waste, power, people, and finance are trafficked. In this article I trace the range of anthropological ...Read More
Effects of size on Vervet ( Cercopithecus aethiops ) gait parameters
A comparison of the values of certain temporal and spatial locomotor parameters was made among ten different‐aged (sized) vervet monkeys locomoting at nine identical speeds. Cycle and stance durations decreased across speed for all the animals; at any one speed both parameters also varied directly with body size. Stride length increased with speed for all the animals and was greater in the larger animals. Swing duration and hindlimb support lengt…
Gait characteristics of two squirrel monkeys, with emphasis on relationships with speed and neural control
Two adult squirrel monkeys (one of each sex) were trained to locomote on a motor‐driven treadmill at seven fixed speeds within 0.89–2.58 m/second. Subsequently, the animals were filmed while locomoting at these speeds, with the films then being used to determine gait parameters. The female monkey exhibited lateral‐sequence symmetrical gaits at slow speeds, and transverse and rotatory gallops at fast speeds. The male used lateral‐sequence symmetri…
Gait characteristics of two macaques, with emphasis on relationships with speed
The gait of a juvenile rhesus monkey as he walked, ran, underwent a run–gallop transition, and galloped on a motor‐driven treadmill is described. Additionally, gait data for an adult animal during walking are also presented. Footfall sequences, stride durations, and absolute and relative swing and stance durations for all four limbs are reported, and, where possible, correlated with speed. Furthermore, support patterns and delays between footfall…
The limbic system and human evolution
Trot‐gallop transition in a macaque
At the trot‐gallop transition, a rhesus monkey's stride rate was approximately half and its stride length double predicted values based on equations presented by Heglund et al. (1974). However, the monkey's trot‐gallop transition speed was consistent with Heglund et al.'s (1974) prediction. The unusual primate footfall pattern may explain the discrepancy in stride rate and length
Neuropsychological implications for preadaptation and language evolution
Masses, centers‐of‐gravity, and moments‐of‐inertia of the body segments of the rhesus monkey ( Macaca mulatta )
Segmental parameters (mass, center‐of‐gravity, and moment‐of‐inertia) are necessary for biomechanical analyses of a species' locomotor behavior. Seven male and eight female adult rhesus monkey cadavers were dismembered in order to determine segmental parameters. Mean values for the segment masses and moments‐of‐inertia are presented for males and females, separately and together. Statistical tests revealed significant differences between the sexe…
The function of ischial callosities
Squirrel monkey locomotion on an inclined treadmill
Masses, centers‐of‐gravity, and moments‐of‐inertia of the body segments of the rhesus monkey ( Macaca mulatta )
Segmental parameters (mass, center‐of‐gravity, and moment‐of‐inertia) are necessary for biomechanical analyses of a species' locomotor behavior. Seven male and eight female adult rhesus monkey cadavers were dismembered in order to determine segmental parameters. Mean values for the segment masses and moments‐of‐inertia are presented for males and females, separately and together. Statistical tests revealed significant differences between the sexe…
Trot‐gallop transition in a macaque
At the trot‐gallop transition, a rhesus monkey's stride rate was approximately half and its stride length double predicted values based on equations presented by Heglund et al. (1974). However, the monkey's trot‐gallop transition speed was consistent with Heglund et al.'s (1974) prediction. The unusual primate footfall pattern may explain the discrepancy in stride rate and length
Effects of growth and speed on hindlimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Hip, knee, and ankle joint displacement patterns are compared across both age and speed for five immature vervet monkeys sampled approximately every 6 months over a 3 year period. The analysis indicated that, as a group, the animals displayed no consistent changes in joint patterns as they grew. However, individual animals showed consistent patterns. There were also no consistent effects of size across animals at the walk–gallop transition. This …
Effects of speed on forelimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Shoulder, elbow and wrist joint angular displacement patterns were analyzed for five vervet monkeys across increasing speed. Within symmetrical gaits, the peak positions of the pattern for each joint tended to decrease with increasing speed as did the yield angle of the elbow (more “yielding”). Across the walk(run)‐gallop transition there were no notable changes in the displacement patterns, but there was a consistent decrease in the range of elb…
Gait characteristics of two squirrel monkeys, with emphasis on relationships with speed and neural control
Two adult squirrel monkeys (one of each sex) were trained to locomote on a motor‐driven treadmill at seven fixed speeds within 0.89–2.58 m/second. Subsequently, the animals were filmed while locomoting at these speeds, with the films then being used to determine gait parameters. The female monkey exhibited lateral‐sequence symmetrical gaits at slow speeds, and transverse and rotatory gallops at fast speeds. The male used lateral‐sequence symmetri…
Effects of size on Vervet ( Cercopithecus aethiops ) gait parameters
A comparison of the values of certain temporal and spatial locomotor parameters was made among ten different‐aged (sized) vervet monkeys locomoting at nine identical speeds. Cycle and stance durations decreased across speed for all the animals; at any one speed both parameters also varied directly with body size. Stride length increased with speed for all the animals and was greater in the larger animals. Swing duration and hindlimb support lengt…
Gait characteristics of two macaques, with emphasis on relationships with speed
The gait of a juvenile rhesus monkey as he walked, ran, underwent a run–gallop transition, and galloped on a motor‐driven treadmill is described. Additionally, gait data for an adult animal during walking are also presented. Footfall sequences, stride durations, and absolute and relative swing and stance durations for all four limbs are reported, and, where possible, correlated with speed. Furthermore, support patterns and delays between footfall…
Effects of size on vervet ( Cercopithecus aethiops ) gait parameters
Changes in the values of certain locomotor parameters were analyzed over a range of speeds for five immature vervet monkeys sampled at 6 month intervals over approximately a 3 year period. Lateral and diagonal sequence walking gaits and transverse and rotary gallops were commonly used. The monkeys switched from walking to galloping at long cycle durations for their mass, although, as a group, their transition speeds were in agreement with data fr…
The limbic system and human evolution
The function of ischial callosities
Masses, centers‐of‐gravity, and moments‐of‐inertia of the body segments of the rhesus monkey ( Macaca mulatta )
Segmental parameters (mass, center‐of‐gravity, and moment‐of‐inertia) are necessary for biomechanical analyses of a species' locomotor behavior. Seven male and eight female adult rhesus monkey cadavers were dismembered in order to determine segmental parameters. Mean values for the segment masses and moments‐of‐inertia are presented for males and females, separately and together. Statistical tests revealed significant differences between the sexe…
Trot‐gallop transition in a macaque
At the trot‐gallop transition, a rhesus monkey's stride rate was approximately half and its stride length double predicted values based on equations presented by Heglund et al. (1974). However, the monkey's trot‐gallop transition speed was consistent with Heglund et al.'s (1974) prediction. The unusual primate footfall pattern may explain the discrepancy in stride rate and length
Neuropsychological implications for preadaptation and language evolution
The limbic system and human evolution
Gait characteristics of two macaques, with emphasis on relationships with speed
The gait of a juvenile rhesus monkey as he walked, ran, underwent a run–gallop transition, and galloped on a motor‐driven treadmill is described. Additionally, gait data for an adult animal during walking are also presented. Footfall sequences, stride durations, and absolute and relative swing and stance durations for all four limbs are reported, and, where possible, correlated with speed. Furthermore, support patterns and delays between footfall…
Gait characteristics of two squirrel monkeys, with emphasis on relationships with speed and neural control
Two adult squirrel monkeys (one of each sex) were trained to locomote on a motor‐driven treadmill at seven fixed speeds within 0.89–2.58 m/second. Subsequently, the animals were filmed while locomoting at these speeds, with the films then being used to determine gait parameters. The female monkey exhibited lateral‐sequence symmetrical gaits at slow speeds, and transverse and rotatory gallops at fast speeds. The male used lateral‐sequence symmetri…
Effects of size on Vervet ( Cercopithecus aethiops ) gait parameters
A comparison of the values of certain temporal and spatial locomotor parameters was made among ten different‐aged (sized) vervet monkeys locomoting at nine identical speeds. Cycle and stance durations decreased across speed for all the animals; at any one speed both parameters also varied directly with body size. Stride length increased with speed for all the animals and was greater in the larger animals. Swing duration and hindlimb support lengt…
Early development of locomotor behavior in vervet monkeys
The locomotor development of three vervet infants across approximately the first 2 months of life is described. Fairly normal‐looking walking movements (as compared to adults) were seen in all the animals by approximately 1 month of age and galloping was observed by 2 months. Early locomotor footfall patterns were often aberrant and bounding‐type gaits were sometimes exhibited. Most of the symmetrical gaits observed were classifiable as lateral s…
Primate Locomotion
Infrastructures are material forms that allow for the possibility of exchange over space. They are the physical networks through which goods, ideas, waste, power, people, and finance are trafficked. In this article I trace the range of anthropological ...Read More
Angular displacement patterns of leading and trailing limb joints during galloping in monkeys
The movement patterns of the joints of the right hind limbs and forelimbs of four vervet and one squirrel monkey were compared during right‐ and left‐lead gallops. Although the overall displacement patterns were similar under both conditions, comparisons of the inflection points in the curves yielded consistent differences in the joints at various phases in the cycle. Some of these differences appear to reflect differing mechanical conditions, wh…
Effects of growth and speed on hindlimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Hip, knee, and ankle joint displacement patterns are compared across both age and speed for five immature vervet monkeys sampled approximately every 6 months over a 3 year period. The analysis indicated that, as a group, the animals displayed no consistent changes in joint patterns as they grew. However, individual animals showed consistent patterns. There were also no consistent effects of size across animals at the walk–gallop transition. This …
Effects of speed on forelimb joint angular displacement patterns in vervet monkeys ( Cercopithecus aethiops )
Shoulder, elbow and wrist joint angular displacement patterns were analyzed for five vervet monkeys across increasing speed. Within symmetrical gaits, the peak positions of the pattern for each joint tended to decrease with increasing speed as did the yield angle of the elbow (more “yielding”). Across the walk(run)‐gallop transition there were no notable changes in the displacement patterns, but there was a consistent decrease in the range of elb…
Effects of size on vervet ( Cercopithecus aethiops ) gait parameters
Changes in the values of certain locomotor parameters were analyzed over a range of speeds for five immature vervet monkeys sampled at 6 month intervals over approximately a 3 year period. Lateral and diagonal sequence walking gaits and transverse and rotary gallops were commonly used. The monkeys switched from walking to galloping at long cycle durations for their mass, although, as a group, their transition speeds were in agreement with data fr…
Squirrel monkey locomotion on an inclined treadmill
Lesions of the Precentral Gyrus in Nonhuman Primates
Situs Inversus
Medical imaging of normal and pathologic anatomy
Resource added for the Diagnostic Medical Sonography program 105262 and Radiography 105261 program.
Biology (14 works) · Primate Behavior and Ecology (12 works) · Animal Vocal Communication and Behavior (10 works) · Medicine (10 works) · Physics (8 works) · Anatomy (7 works) · Anatomy (7 works) · Psychology (7 works) · Gait (6 works) · Mathematics (6 works)