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PubMed2000

Do California ground squirrels (Spermophilus beecheyi) use ritualized syntactic cephalocaudal grooming as an agonistic signal?

Animal communication theory holds that many signals have evolved from nonsignal precursors. This field and laboratory study of California ground squirrels (Spermophilus beecheyi) provides evidence for the coexistence of such a precursor with its derived display. The precursor is an ancient, endogenously sequenced (syntactic) pattern of cephalocaudal grooming movements (CCGs) shared by all rodent suborders. The following evidence supports the hypothesis that a supernormal version of this pattern has been selected for signal function. Syntactic CCGs in the field (a) were more rigidly stereotyped than ordinary syntactic CCGs in the laboratory; (b) differed from laboratory syntactic CCGs in other ways that enhanced their conspicuousness, in part through exaggeration of the syntactic cephalocaudal pattern; (c) were associated with scent marking and social staring; and (d) were associated with intrasexual agonistic encounters that did not escalate to fighting.

Animal Communication↗
PubMed1973

Evidence for higher functions of the cerebellum: eating and grooming elicited by cerebellar stimulation in cats.

Well-organized eating and grooming behaviors were elicited in cats by stimulation of a zone in the cerebellum that extended from the fastigial nucleus to the superior cerebellar peduncle. Behaviors appeared to result from the facilitation of specific sensorimotor mechanisms, rather than the induction of generalized "drive" states. The results emphasize the need for a broad view of cerebellar function.

Animals↗
PubMed1990

Fecundity of partially engorged female Dermacentor albipictus (Acari: Ixodidae) removed by cattle grooming.

Eight Hereford heifer calves were infested 28 times over a 64-d period with approximately 49,560 Dermacentor albipictus (Packard) larvae per calf. The fecundity of partially engorged and small, fully engorged female ticks, prematurely removed by grooming behavior of the calves, were compared. A total of 3,532 females of various engorged weights was collected from all calves, resulting in a mean female tick yield of 1.78% based on the number of larvae used for all infestations. The ratio of partially to fully engorged females was 1:16. Female oviposition success was 96%. The mean (+/- SE) values for female weight, number of larvae, and percentage larval eclosion of 50 partially engorged females that ranged in weight from 54 to 397 mg was 174 +/- 99, 1,272 +/- 931 and 85 +/- 14, respectively. The correlation between preoviposition weight and number of larvae from partially engorged females was highly significant (r = 0.95, P less than 0.0001). A prediction model (Y = -354.6 + 9.07X) showed that the preoviposition weight of partially engorged females and larval fecundity from a separate study was highly correlated (r = 0.92, P less than 0.0001). There was no significant difference between mean values of larval numbers and percentage eclosion for partially engorged and small, fully engorged females of similar weight.

Animals↗
PubMed1988

Pharmacological studies of grooming and scratching behavior elicited by spinal substance P and excitatory amino acids.

Compounds that produce depolarization of nociceptive neurons in the dorsal horn of the spinal cord also elicit a rather specific kind of caudally directed biting, licking, and/or scratching behavior when they are injected intrathecally in mice. We sought to use this elicited grooming behavior as a test for compounds that might inhibit the neurons excited by the excitatory agents. All three neurokinins--substance P, neurokinin A (substance K), neurokinin B (neuromedin K)--and excitatory amino acids active at N-methyl-D-aspartate (NMDA) or quisqualate receptors produce similar behaviors, which last for 1 minute after i.t. injection. Our data indicate that mu opioid agonists or alpha adrenergic agonists block both neurokinin-elicited behavior and EAA-elicited behavior; delta opioid agonists block only neurokinin-elicited behavior; and PCP/sigma "opioid" agonists block only EAA-elicited behavior. Somatostatin and serotonin produce qualitatively different behaviors by themselves and, when administered with neurokinins, partially block neurokinin-elicited behavior.

Amino Acids↗
PubMed1973

Development of grooming in mice with amputated forelimbs.

Face grooming sequences that involve coordination of the shoulders, tongue, and eyes develop remarkably normally in inbred mice with one or both forelimbs amputated from birth. This indicates endogenous control with a strong genetic component. Evidence for the maturational expression of "sensory expectations" was also obtained.

Amputation, Surgical↗
PubMed1973

Predatory attack, grooming, and consummatory behaviors evoked by electrical stimulation of cat cerebellar nuclei.

Electrical stimulation at single sites in the rostral fastigial nucleus elicits hypertension, grooming, feeding, and attack behaviors in the cat. The stimulus intensity and availability of suitable goal objects determines the behavior. Bilateral lesions of the area fail to produce motor deficits. The rostral fastigial nucleus may be a cerebellar area for behavioral and autonomic regulation.

Aggression↗
PubMed1995

Effects of the sucking louse (Linognathus vituli) on the grooming behaviour of housed calves.

The behaviour of cattle with and without louse infestation was studied for eight weeks. Thirty-two crossbred calves were housed in groups of four at 20 weeks old. Sixteen of the calves were artificially infested with the long-nosed cattle louse Linognathus vituli and 16 were left uninfested as controls. In infested animals the number of lice on the shoulders averaged 2.3 per 10 cm length of parted hair. The recorded frequency of irritation, manifested by rubbing and self-licking, was significantly greater in the louse-infested calves than in the uninfested controls. The infested calves spent 28 s/h rubbing and 95 s/h self-licking, compared with 8 s and 62 s/h spent by the uninfested controls. The infested calves also spent more than twice as long scratching as the controls. There were no significant effects of the infestation on social grooming.

Animals↗
PubMedDate not supplied

[The effect of new ACTH fragments on the behaviors of self-stimulation, avoidance and grooming in rabbits].

We studied the influence of new cyclic analogues of ACTH fragments EHFRWGKPVG-NH2 and KHFRVG-NH2 on self-stimulation (SS) and active avoidance (AA) behaviour. Intraventricular injection of EHFRWGKPVG-NH2 in low doses (0.5-2.5 mcg) was shown to increase, that in higher doses (4-5 mcg) to decrease SS frequency. Injection of KHFRWG-NH2 in doses of 0.1-5 mcg resulted in 25-30% decrease of SS frequency during the first 15 min, its subsequent return to the background level and repeated decrease. In 24-48 h SS was 5-8% higher than the background level and practically was unchanged in the course of 2 h of experiment. When testing AA behaviour EHFRWGKPVG-NH2 in doses of 0.5-2 mcg induced twice shorter "anxiety time" and longer latency of AA. Both fragments (0.1-5 mcg) evoked excessive grooming. These effects persisted for 24-72 h. The role of the cyclic analogues of ACTH fragments in the mechanisms of positive and negative reinforcement is discussed.

Adrenocorticotropic Hormone↗
PubMed1996

Central generation of grooming motor patterns and interlimb coordination in locusts.

Coordinated bursts of leg motoneuron activity were evoked in locusts with deefferented legs by tactile stimulation of sites that evoke grooming behavior. This suggests that insect thoracic ganglia contain central pattern generators for directed leg movements. Motoneuron recordings were made from metathoracic and mesothoracic nerves, after eliminating all leg motor innervation, as well as all input from the brain, subesophageal ganglion, and prothoracic ganglion. Strong, brief trochanteral levator motoneuron bursts occurred, together with silence of the slow and fast trochanteral depressor motoneurons and activation of the common inhibitor motoneuron. The metathoracic slow tibial extensor motoneuron was active in a pattern distinct from its activity during walking or during rhythms evoked by the muscarinic agonist pilocarpine. Preparations in which the metathoracic ganglion was isolated from all other ganglia could still produce fictive motor patterns in response to tactile stimulation of metathoracic locations. Bursts of trochanteral levator and depressor motoneurons were clearly coordinated between the left and right metathoracic hemiganglia and also between the mesothoracic and the ipsilateral metathoracic ganglia. These data provide clear evidence for centrally generated interlimb coordination in an insect.

Animals↗
PubMed1993

Grooming and vacuous chewing induced by SK&F 83959, an agonist of dopamine 'D1-like' receptors that inhibits dopamine-sensitive adenylyl cyclase.

The benzazepine SK&F 83959 demonstrates high affinity for dopamine D1 receptors and potently inhibits the stimulation of adenylyl cyclase by dopamine. This compound induced the same intense grooming behaviour identified previously as a characteristic response to typical dopamine D1 receptor agonists such as SK&F 77434 that stimulate adenylyl cyclase; it also induced vacuous chewing. These findings constitute direct evidence for a behaviourally relevant subtype of 'D1-like' receptor that is not linked to adenylyl cyclase.

2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-ben↗
PubMed1995

Behavior of the Roman/Verh high- and low-avoidance rat lines in anxiety tests: relationship with defecation and self-grooming.

The Swiss sublines of Roman high- and low-avoidance (RHA/Verh and RLA/Verh) rats have been selected and bred for rapid (RHA/Verh) vs. extremely poor (RLA/Verh) acquisition of two-way active avoidance. Behavioral and physiological measures of emotionality, or reactivity to stress, appear to be among the most prominent characteristics differentiating both rat lines. The present study shows that RLA/Verh rats are more sensitive, as compared to their RHA/Verh counterparts, to the conflict involved in the shock-induced suppression of drinking paradigm, as well as in a hyponeophagia test. RLA/Verh rats also showed higher defecation values which were significantly correlated with the main hyponeophagia test variables. Likewise, self-grooming was more frequent in RLA/Verh rats than in their RHA/Verh counterparts and showed significant correlations with conflict-related behaviors (i.e., latency to start eating and time spent eating) from the hyponeophagia test. These results give additional support to the contention that RLA/Verh rats present higher anxiety (emotionality) than their RHA/Verh counterparts.

Animals↗
PubMedDate not supplied

Grooming the victim: an analysis of a perpetrator's seduction letter.

The authors review the current literature on the sexual victimization of adolescent males with attention given to victim characteristics and victim selection factors and strategies. Following this review, a letter written by a middle-aged man to entice a teenage boy into sexual activity is presented and analyzed. The strategy used by the letter-writer is to refute the usual reservations a teenage boy might have about engaging in sexual activity with a man. The approach used in the letter and the ensuing analysis are generalizable to teenage boys experiencing similar encounters and highlight the sophisticated seduction and grooming strategies used to sexually victimize adolescent males.

Adolescent↗
PubMed2005

A G protein-coupled receptor, groom-of-PDF, is required for PDF neuron action in circadian behavior.

The neuropeptide Pigment-Dispersing Factor (PDF) plays a critical role in mediating circadian control of behavior in Drosophila. Here we identify mutants (groom-of-PDF; gop) that display phase-advanced evening activity and poor free-running rhythmicity, phenocopying pdf mutants. In gop mutants, a spontaneous retrotransposon disrupts a coding exon of a G protein-coupled receptor, CG13758. Disruption of the receptor is accompanied by phase-advanced oscillations of the core clock protein PERIOD. Moreover, effects on circadian timing induced by perturbation of PDF neurons require gop. Yet PDF oscillations themselves remain robust in gop mutants, suggesting that GOP acts downstream of PDF. gop is expressed most strongly in the dorsal brain in regions that lie in proximity to PDF-containing nerve terminals. Taken together, these studies implicate GOP as a PDF receptor in Drosophila.

Animals↗
PubMed1988

Syncope associated with hair-grooming.

We report 20 girls who experienced episodes of unconsciousness while standing for hair grooming. The episodes were syncopal in character, electroencephalograms were normal in most cases, and at least 11 of the 20 had definite episodes of syncope in other circumstances. A number of these girls underwent extensive diagnostic testing. We consider this a form of situational or reflex syncope, perhaps related to orthostatic hypotension, the recognition of which may spare unnecessary diagnostic and therapeutic interventions.

Adolescent↗
PubMed1996

Training staff to prevent aggressive behavior of cognitively impaired elderly patients during bathing and grooming.

1. Cognitively impaired elderly patients often become aggressive toward caregivers who are providing assistance with bathing and grooming, but caregivers can learn methods to prevent or reduce some of the aggression. 2. The R.E.S.P.E.C.T. model describes key practices caregivers can use to better meet patient needs and reduce aggression, increasing their understanding and skill. 3. In addition to training, observation of performance and consultation are important steps in enabling caregivers to apply and maintain their skills.

Adult↗