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 29,987 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

21 male and 18 female juvenile rhesus monkeys whose mothers' prenatal diets varied according to protein content (either 1-, 2-, or 4-gm protein/kg body weight/day) were given a food-preference task. 20 monkeys were between 3 and 4 yr. old; 19 were between 1 1/2 and 2 1/2 yr. old. For each trial small pieces of the same type food were placed in 8 equally spaced wells about the circumference of a circular tray held outside each monkey's cage. Responsiveness to the 21 natural foods (assorted cheeses, meats, vegetables, nuts, cereals, fruits, and candies) offered 3 times on 3 different occasions was measured by recording number of pieces taken, number eaten, and elapsed time for taking all 8 pieces. All 3 measures were highly correlated. All diet groups exhibited the same general order of preference, males taking and eating more food pieces faster than females. Order of preference was significantly different for old versus young juveniles, with older juveniles' preferences more similar to those of adult female monkeys given the same task. The most notable differences in eating behavior were that younger juveniles played with their food and were less finicky about what they ate. Results suggest that food preferences of juvenile monkeys are not altered as a consequence of their mothers' prenatal protein deprivation.
Percept Mot Skills 1977 Aug
PMID:Protein deprivation in primates: XII. food preferences of juvenile rhesus monkeys. 40 89

Three groups of adult female rhesus monkeys, maintained on low-protein diets (.5 gm, 1 gm, and 2 gm protein per kg body weight, were compared with a control group (4 gm protein per kg body weight) on a food-preference task. Food responsiveness was assessed by presenting 8 small pieces of a certain food, equally spaced about the perimeter of a turntable attached to the home cage, and recording number of pieces taken, number of pieces eaten, and elapsed time for taking all 8 pieces. 21 different foods were used in sequence, 3 each from the following 7 categories: cheese, meat, vegetable, nut, cereal, fruit, and candy. Scores on all 3 measures were highly correlated, and the order of preference was generally the same for all groups. The 2 lowest-protein groups accepted more foods at the lower end of the palatability spectrum than did either the 4-gm or the 2-gm group. There was a tendency for the foods least preferred by the protein-deprived monkeys to be themselves high in protein. Thus, although protein deprivation appears to increase the catholicity of food preference, there is no corresponding increase in the relationship between palatability and protein content.
Percept Mot Skills 1975 Aug
PMID:Protein deprivation in primates: VI. Food preferences of adult rhesus monkeys maintained on low-protein diets. 118 38

The present report describes respiratory-like activity recorded from intercostal muscles in the neonatal rat in vitro brain stem-spinal cord, rib-attached preparation. In this preparation from 1- to 4-day-old rats, spontaneous rhythmic and synchronized upward movements of the rib cage coincided with the recorded muscle activity. Spontaneous respiratory-like activity showed a frequency in the range of 0.05-0.2 Hz, with single-, double-, and mixed-burst patterns. Spontaneous activity declined over time, but increased in frequency as temperature increased. Multilevel recordings showed a cephalocaudal order of bursting of intercostal muscles. Brain stem transections at the prepontine level did not affect spontaneous frequency, whereas premedullary transections resulted in an increase in spontaneous respiratory frequency. High spinal transections eliminated spontaneous respiratory-like activity. These results suggest that there is a well-organized pontomedullary pattern generator for respiratory-like activity in this preparation, which can be modulated by temperature. The characteristics of these electromyographic (EMG) recordings allow comparison with previous in vitro studies of respiratory-like activity using nerve activity and in vivo studies using EMG activity. These results provide basic information on the spontaneous activity of this preparation as a prelude to the study of the effects of electrical stimulation of the spinal cord to induce respiratory-like activity, as described in the companion article.
Somatosens Mot Res 1992
PMID:Respiration in vitro: I. Spontaneous activity. 149 29

The present paper indicates that it is with appropriate methods, i.e., maze learning and a not-previously used home-cage open-field, possible to observe a learning-induced ambulation increase in a familiar environment lacking novel cues. This finding is at variance with an earlier one achieved by electromagnetic recordings indicating a decrease in activity in the home-cage after passive avoidance conditioning.
Percept Mot Skills 1990 Apr
PMID:Home-cage open-field ambulation after maze learning in mice. 234 33

Thoracic spine (T1-T10) fractures can be considered a specific entity owing to the anatomic features of the rib cage and the spinal canal. During a nine year period, the authors treated 105 such fractures. The thoracic spine fractures included 57 (54.2 per cent) compression fractures, 21 (20 per cent) comminuted (burst) fractures, 3 (2.8 per cent) flexion-distraction fractures, and 24 (23 per cent) fracture-dislocations. Five lesions, termed "fracture-dislocations by an oblique shearing force", were characterized by considerable displacement and the absence of neurologic injury. 35.2 per cent of the patients had injuries at multiple levels. The frequency of associated thoracic (26.5 per cent) and scapular injuries (20 per cent) reflected involvement of the entire thoracic cage. The frequency of neurologic impairment (30.4 per cent including 20 per cent complete paraplegia) reflects the particular vulnerability of the dorsal spinal cord. 32 per cent of the patients presented one or more thoracic effusions (hemomediastinum, hemothorax) related to parietal hematoma and/or hematoma at the fracture site. Functional management of 47 patients led to recovery of a painless spine without kyphotic deformity. Conservative treatment was often difficult because of associated parietal lesions; the 10 patients treated in this manner had only moderate reductions that maintained poorly in time, but had no major painful sequellae. A posterior approach was used for 42 patients with unstable or neurotoxic fractures because this permitted a complete decompression down to the posterior wall, when necessary by a "wide laminectomy". The anterior approach was reserved for purely anterior compression (3 cases) or residual compression after an initial posterior procedure (2 cases). Cotrel-Dubousset instrumentation (used in 7 cases) was particularly indicated because it offers the advantages of Harrington rods (31 cases) while providing better stabilization. This prevented later loss of reduction and obviated the need for a postoperative brace.
Rev Chir Orthop Reparatrice Appar Mot 1989
PMID:[Fractures of the thoracic spine (T1-T10). Apropos of 105 cases]. 259 50

Familiarity with a conditioning context different from the home-cage environment was examined in immediate and delayed (3-hr.) conditioned taste aversion (CTA) learning for young-adult (90-120 days) and old-age (680-750 days) female Wistar albino rats. Context familiarity increased CTA for young adults at the 3-hr. delay. Old-age rats showed no aversion at 3-hr. delays. Results suggest that home-cage cues may be used in mediating long-delay CTA and that the role of these cues may differ with age.
Percept Mot Skills 1993 Dec
PMID:Context familiarity and delayed conditioned taste aversion in young-adult and old-age rats. 817 Jul 97

Primate infants separated from their mothers and kept alone for a long period may exhibit behavioral disorders and develop stereotyped behavior according to genetic predispositions of the infants and environmental factors such as characteristics of the cage. However, it is not clear whether the locomotive and repetitive stereotyped behaviors are related to maternal separation or isolation rearing early in life. The locomotive and repetitive stereotyped behaviors and their relationship were examined with 65 juveniles of cynomolgus macaques kept under artificial conditions. All infants were separated from their mothers and kept with peers. Observations were conducted when they were about three to five years old. The monkeys exhibited locomotive and repetitive stereotyped behavior such as turning, backward somersaulting, and bouncing. Most showed both turning and backward somersaulting. Observations indicated that social interactions with peers following maternal separation at the age of 3 to 5 mo. produce the locomotive and repetitive stereotyped behavior and that turning may change to backward somersaulting for older infants. Further work with controls for several factors is needed.
Percept Mot Skills 1996 Dec
PMID:Locomotive stereotyped behavior in cynomolgus macaques, Macaca fascicularis. 896 31

The use of perches to enrich the environment of group-housed Japanese monkeys (Macaca fuscata) was assessed. When monkeys were housed in a cage which contained eight wooden perches to increase the usable space, the rate of agonistic interactions as well as the rates of spatial proximity and social grooming decreased in comparison with those evident when they were housed in a cage without such perches. These results suggest that agonistic interactions were reduced which are likely to occur more frequently in crowded conditions and the monkeys displayed affiliative behavior such as social grooming more frequently in a cage without perches, i.e., more crowded conditions, than in a cage with perches. Attempts to enrich the environment of group-housed monkeys may lead to a better understanding of their behavioral flexibility and social adjustment.
Percept Mot Skills 1998 Oct
PMID:Behavioral effects of perches on group-housed adult female Japanese monkeys. 984 27

The aim of this paper is to show the activity cage as a viable method for tracking functional nerve recovery. The activity cage measures spontaneous coordinate activity, meaning movement in either the horizontal or vertical plane, of experimental animals within a specified amount of time. This uses a minimum of researcher time conducting functional testing to determine functional recovery of the nerve. Using microsurgical forceps, a crush injury was inflicted unilaterally, on the left side, upon the 4-month-old C3H mice creating a very high degree of pressure for 6 s upon the exposed sciatic nerve. The locomotion function of the mice was evaluated using the activity cage preoperatively, 1, 7, 14, 21, and 28 days after the surgical procedure. We found that using the activity cage functional recovery occurred by 14 days after nerve crush injury. It was also shown that, coinciding with functional recovery, immunohistochemistry changes for GD1a and nNOS appeared at the level of L4, where the sciatic nerve joins the spinal column. GD1a and nNOS have both been linked to regenerative processes in mammalian nervous systems.
Somatosens Mot Res 2007 Dec
PMID:Activity cage as a method to analyze functional recovery after sciatic nerve injury in mice. 1809 94