Postnatal Growth and Sexual Dimorphism in the Skull of the Japanese Macaque (&lt;i&gt;Macaca fuscata&lt;/i&gt;)

Mouri, Toshio

doi:10.1537/ase.102.supplement_43

Cited by 22 publications

(20 citation statements)

References 22 publications

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“…In previous studies, ages of the monkeys were unknown and we estimated their ages from eruption of the permanent teeth. It is also known that body weights are closely related with ages in young monkeys (Mouri 1994). Body weights of 3 monkeys used in the present study (3.0-3.6 kg) were lighter than those of the monkeys used in previous studies (3.75-4.5 kg in Takeichi Comparison of body weights and dental ages in these studies suggests that the monkeys used in the present study were youngest.…”

Section: Discussionsupporting

confidence: 47%

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Directional asymmetry in vertical smooth-pursuit and cancellation of the vertical vestibulo-ocular reflex in juvenile monkeys

et al. 2007

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Young primates exhibit asymmetric eye movements during vertical smooth-pursuit across a textured background such that upward pursuit has low velocity and requires many catch-up saccades. The asymmetric eye movements cannot be explained by the un-suppressed optokinetic reflex resulting from background visual motion across the retina during pursuit, suggesting that the asymmetry reflects most probably, a low gain in upward eye commands (Kasahara et al. 2006). In this study we examined 1) whether there are intrinsic differences in the upward and downward pursuit capabilities and 2) how the difficulty in upward pursuit is correlated with the ability of vertical VOR cancellation. Three juvenile macaques that had initially been trained only for horizontal (but not vertical) pursuit were trained for sinusoidal pursuit in the absence of a textured background. In 2 of the 3 macaques, there was a clear asymmetry between upward and downward

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Section: Discussionsupporting

confidence: 47%

“…By careful examination of tooth eruption, Mouri (1994) reported that male adolescent growth starts when Japanese macaques reach 4 years old and that full eruption of all the permanent teeth occurs 5 during their sixth year. Female reproductive ability is reported to be complete at 8 years old.…”

Section: Methodsmentioning

confidence: 99%

Directional asymmetry in vertical smooth-pursuit and cancellation of the vertical vestibulo-ocular reflex in juvenile monkeys

et al. 2007

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“…Full eruption of all the permanent teeth occurs by 6.25 years old (Mouri 1994). Two monkeys (K, M) were approximately 5 years old for Experiment 1 and 2.…”

Section: Methodsmentioning

confidence: 99%

“…Monkey B was also 6 years old during Experiment 3. Mouri (1994) reported that in Japanese macaques' adolescent growth, the male spurt seems to start far after the end of the female spurt. Thus, all the monkeys tested in this study seem to be juvenile.…”

Section: Methodsmentioning

confidence: 99%

Further evidence for selective difficulty of upward eye pursuit in juvenile monkeys: effects of optokinetic stimulation, static roll tilt, and active head movements

et al. 2005

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The smooth-pursuit system moves the eyes in space accurately to track slowly moving objects of interest despite visual inputs from the moving background and/or vestibular inputs during head movements. Recently, our laboratory has shown that young primates exhibit asymmetric eye movements during vertical pursuit across a textured background; upward eye velocity gain is reduced. To further understand the nature of this asymmetry, we performed three series of experiments in young monkeys. In Experiment 1, we examined whether this asymmetry was due to an un-compensated downward optokinetic reflex induced by the textured background as it moves across the retina in the opposite direction of the pursuit eye movements. For this, we examined the monkeys’ ability to fixate a stationary spot in space during movement of the textured background and compared it with vertical pursuit across the stationary textured background. We also examined gains of optokinetic eye movements induced by downward motion of the textured background during upward pursuit. In both task conditions, gains of downward eye velocity induced by the textured background were too small to explain reduced upward eye velocity gains. In Experiment 2, we examined whether the frame of reference for low-velocity, upward pursuit was orbital or earth vertical. To test this, we first applied static tilt in the roll plane until the animals were nearly positioned on their side in order to dissociate vertical or horizontal eye movements in the orbit from those in space. Deficits were observed for upward pursuit in the orbit but not in space. In Experiment 3, we tested whether asymmetry was observed during head-free pursuit that requires coordination between eye and head movements. Asymmetry in vertical eye velocity gains was still observed during head-free pursuit although it was not observed in vertical head velocity. These results, taken together, suggest that the asymmetric eye movements during vertical pursuit are specific for upward, primarily eye pursuit in the orbit

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“…Age was divided into 9 dental ages on the basis of dental eruption (Mouri, 1994). Dental age 8, which is defined as a period before the full eruption of all four permanent canines after the full eruption of all four permanent third molars, is not observed in females, because in females the full eruption of canines is always earlier than that of third molars.…”

mentioning

confidence: 99%

Multivariate Cranial Ontogenetic Allometries in Crab-eating, Rhesus and Japanese Macaques.

Mouri

1996

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Postnatal Growth and Sexual Dimorphism in the Skull of the Japanese Macaque (<i>Macaca fuscata</i>)

Cited by 22 publications

References 22 publications

Directional asymmetry in vertical smooth-pursuit and cancellation of the vertical vestibulo-ocular reflex in juvenile monkeys

Directional asymmetry in vertical smooth-pursuit and cancellation of the vertical vestibulo-ocular reflex in juvenile monkeys

Further evidence for selective difficulty of upward eye pursuit in juvenile monkeys: effects of optokinetic stimulation, static roll tilt, and active head movements

Multivariate Cranial Ontogenetic Allometries in Crab-eating, Rhesus and Japanese Macaques.

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