Four features of a decerebrate cat are

Cats actively respond to horizontal perturbations of the supporting surface according to the force constraint strategy. In this strategy, the force responses fall into two groups oriented in either rostral and medial directions or caudal and lateral directions, rather than in strict opposition to the direction of perturbation A cat that is decerebrated with a transection starting just rostral to the superior colliculus and extending rostroventrally to the rostral tip of the mammillary bodies produces a premammillary preparation that can spontaneously elicit bouts of locomotion lasting from minutes to hours

A method of producing decerebrate rigidity in cats by means of a radiofrequency current was developed. Adequate control of the extent and shape of the lesions necessitated a preliminary investigation of the relationship between the intensity and duration of current, the size of the lesion, and the tissue impedance before and after destruction; this was performed on guinea pigs With these four compounds and chlorpromazine there was a significant correlation between the a-blocking potency (see Table 1) and the anti-rigidity potency in the intercollicular decerebrate cat

The different data points were obtained from the gastrocnemius muscles of 4 decerebrate cats. The solid lines describe the characteristics of the com- puter model used to simulate the reflex behavior both with and without tendon organ feedback. procedure was first carried out with the reflex arc intact and was then repeated in the same cats. EXPERIMENTAL NEUROLOGY 51, 337-346 (1976) Reflex Figures in the Decerebrate and Spinal State JANETT TRUBATCH AND A. VAN HARREVELD r Department of Physiology, New York Medical College, Valhalla, New York 10595 and Biology Division, California Institute of Technology, Pasadena, California 91125 Received October 21, 1975 The flexors and extensors of the hind limb of the cat were simultaneously. Abnormal posturing, or GCS motor score of less than 4, after 1-day post-insult, suggested virtually no chance of regaining independence. Patients with gunshot wounds to the head who demonstrated either decorticate or decerebrate posturing had a close to zero chance of a meaningful recovery. The Hunt and Hess subarachnoid hemorrhage severity. We found that all decerebrate cats studied (n = 7) were capable of simultaneous BIDI locomotion on a split-belt treadmill (Fig. 1a,b) during ES of the spinal cord. The initiation period, that is. (1) Vestibulo-ocular reflex excitation of the six extraocular muscles was studied by recording their electromyographic activity in decerebrate cats during oscillations about horizontal and vertical axes, at frequencies from 0.07 to 4 Hz. Animals were oriented in many different positions and rotated about axes that lay in the horizontal, frontal, or sagittal planes defined by our coordinate system


  1. muscle ofthe decerebrate cat without producing anyappreciable change in its respiration. 2. Manual squeezing ofthe same muscle produced a large increase in ventilation. 3. As vibration is known to be a powerful stimulus for the primary endings of the muscle spindle it is concluded that these receptors are unlikely to have any significant role.
  2. Nevertheless, locomotion in the decerebrate cat can be regular, vigorous and give every appearance of normal rhythm and posture of the limbs. The locomotor pattern also adapts readily to the speed of the treadmill belt. Thus such abnormalities as may exist in the decerebrate cat are not likely to have affected the main features of fusimotor.
  3. In decerebrate cats, rotation about the longitudinal axis of the animal, leading to sinusoidal stimulation of labyrinth receptors, produces a tonic contraction of limb extensors during side-down tilt (α responses) and of dorsal neck extensors during side-up tilt (β responses). These changes in posture are mediated, at least in part, by lateral vestibular nucleus (LVN) neurons, with response.
  4. In decerebrate cats, about half (53 %) of LTF neurons had response vector orientations that were closer to the pitch than the roll plane, with 60 % of these units being excited by nose-down pitch. However, a chi-square test failed to reveal that the major axis of tilt that excited LTF neurons (ipsilateral ear down, contralateral ear down, nose.
  5. The effects of the cutaneous input on the formation of the locomotor pattern in conditions of epidural stimulation of the spinal cord in decerebrate cats were studied. Locomotor activity was induced by rhythmic stimulation of the dorsal surface of spinal cord segments L4-L5 at a frequency of 3-5 Hz. Electromyograms (EMG) recorded from the antagonist muscles quadriceps, semitendinosus.
  6. *4. Dimethothiazine had little significant effect on the discharge frequency of afferent fibres frommusclespindles in thesoleus muscleofdecerebrateprepara-tions wherethe ventral roots were cut. 5. These effects of dimethothiazine on muscle spindle activity were not related to anychanges in blood pressure of the decerebrate cat. 6

The motor effects induced by pulsed magnetic fields (PMF) projected onto the lumbar and cervical spinal cord were studied in decerebrate cats. A magnetic coil (inductor) of diameter 8 cm was positioned 1-2 cm above the surface of the spinal cord. Stimulation of the spinal cord with PMF was performed in two regimes: with single impulses with an intensity of 0.5-1 T and with continuous. Cerebellar unit responses of the mossy fibre system to passive movements in the decerebrate cat. I. Responses to static parameters. Kolb FP(1), Rubia FJ, Bauswein E. Author information: (1)Physiologisches Institut der Universität München, Federal Republic of Germany It has been established that stepping of the decerebrate cat was accompanied by involvement of the urinary system: external urethral sphincter (EUS) and detrusor muscle activation, as well as the corresponding increase of the intravesical pressure. Detrusor and EUS evoked EMG activity matched the li 1. We examined the interaction between central pattern generators for respiration and deglutition in decerebrate, vagotomized, paralysed and ventilated cats (n = 10), by recording activity from the following nerves: hypoglossal, phrenic, thyroarytenoid and triangularis sterni. Fictive breathing was The threshold concentration for female cats, however, is not known. Consequently, we applied 17beta-estradiol to a well covering the L6-S1 spinal cord in decerebrate female cats. The exercise pressor reflex was evoked by electrical stimulation of the L7 or S1 ventral root, a maneuver that caused the hindlimb muscles to contract statically

Decerebrate rigidity produced in cats by focal

and decerebrate cats. In both preparations, RVLM neurons exhibited similar levels of spontaneous activity (median of 17 spikes/s). The firing of about half of the RVLM neurons recorded in decerebrate cats was modulated by rotations; these cells were activated by vertical tilts in a variety of directions, with response characteristics. 1. The effect of single shock electrical stimulation, up to 20 x threshold (T), of the medial plantar nerve on the discharges of single medial gastrocnemius static and dynamic gamma-efferents has been investigated in the decerebrate cat. 2. The neurones. The Decerebrate Cat Generates the Essential Features of the Force Constraint Strategy . By Claire F. Honeycutt and T. Richard Nichols. We have recently shown that electromyographic responses from limb muscles of the decerebrate cat resemble those obtained in the intact animal. Our objectives here were to determine whether the decerebrate.

Some aspects of the pharmacology of decerbrate rigidity

Decorticate posturing occurred in 80, decerebrate in 61 and opisthotonic posturing in 22 patients. Posturing was associated with age ≥ 3 years (48.1 vs 35.8%, p = 0.01) and features of raised intracranial pressure on funduscopy (adjusted OR 2.1 95%CI 1.2-3.7, p = 0.009) but not other markers of severity of disease Decerebrate posture. Decerebrate posture is an abnormal body posture that involves the arms and legs being held straight out, the toes being pointed downward, and the head and neck being arched backward. The muscles are tightened and held rigidly. This type of posturing usually means there has been severe damage to the brain Electromyographic analysis of postural reflexes in (1) patients considered decerebrate, ie, manifesting the signs reported in monkeys with brain stem transection, (2) patients with upper motoneuron disorders, and (3) normal controls revealed in all groups a stereotyped extensor posturing especially of the forelimbs, called the reactive extensor postural synergy (REPS), with increased.

The role of cutaneous afferents in the control of gamma-motoneurones during locomotion in the decerebrate cat. Murphy PR, Hammond GR. J Physiol, 434:529-547, 01 Mar 1991 Cited by: 4 articles | PMID: 202312 Fictive locomotion in the adult decerebrate and spinal mouse in vivo. Our results demonstrate that several features of the mouse locomotor CPG are similar to those that have been observed in rat, cat, rabbit and monkey suggesting a fairly conserved organisation and allowing for future results in transgenic mice to be extrapolated to. Previous studies, which have demonstrated that carbamazepine (CBZ) possesses direct muscle spindle suppressant activity, suggest that CBZ may have therapeutic value in the treatment of hypertonic disorders characterized by high fusimotor drive. The effects of CBZ on motor tone in the midcollicular decerebrate cat were therefore examined. CBZ, in a concentration-dependent manner, reduced muscle.

decerebrate [de-ser´ĕ-brāt] 1. to eliminate cerebral function by transection of the brainstem or ligation of the common carotid arteries and basilar artery at the center of the pons. 2. a laboratory animal so prepared. decerebrate rigidity a posture found in those with lesions of the upper part of the brainstem or severe bilateral lesions of the. Hit the bongos like Bongo Cat! Bongos A D A Category 4 hurricane: Catastrophic damage will occur. During a Category 4 hurricane, winds range from 130 to 156 mph. At these speeds, falling and flying debris poses a very high risk of injury or. Historically, decerebrate nonparalyzed cats walking on treadmills have been used to demonstrate the influence of afferent feedback on the locomotor pattern. This is also possible in nonparalyzed mice

Tendon organ function - ScienceDirec

This decerebrate rigidity was visible as soon as anesthesia was discontinued. Bard reported in 1958 that animals with decerebrate rigidity would show periodic limb relaxation. We now know that Bard and Macht were observing the periodic muscle atonia of REM sleep. After the discovery of REM sleep in the cat, Jouvet foun Learn about decorticate posturing. Decorticate posturing is a type of abnormal or pathologic posturing often caused by damage to the brain. Discover a full description of decorticate posturing, a. 4 Rockwell Automation Publication 1585-TD001G-EN-P - March 2021 Ethernet Media Specifications Shielded Twisted-pair (Foil and Braided Shield) Features • Four- and eight-conductor styles • Twisted-pair shielded cable types, Cat 5

Reflex figures in the decerebrate and spinal state

Mixed mode oscillations were also observed in motoneurons in both anesthetized and decerebrate cats. Because the data of 4/5 decerebrate cats originated from experiments in which only 3 kHz switching frequency (DCC mode) was used, it was only possible to systematically analyze the features of this in the barbiturate-anesthetized cats Doja Cat // Planet Her // The New Album Out NowListen Here // https://smarturl.it/xPlanetHer Hop onboard InterstellHER Air to meet Doja Cat at Planet Her Information about peripheral events conveyed to the cerebellum via the climbing fiber system in the decerebrate cat. Kolb FP, Rubia FJ. Exp Brain Res, 38(4):363-373, 01 Jan 1980 Cited by: 21 articles | PMID: 736397 theintact cat, aconditionedeye-blinkre-sponse can be established by system-atically pairing a neutral acoustic condi-tioned stimulus (CS), which does not produce a response (3), with an un-conditioned shock stimulus (US), which produces an unconditioned blink re-sponse (UR). After repeated pairings, the CS begins to evoke a conditioned blink.

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Decerebrate And Decorticate Posturing Articl

Microinjections of alpha 1- and alpha 2-noradrenergic substances in the cerebellar vermis of decerebrate cats affect the gain of the vestibulospinal reflexes into the vermal cortex of the cerebellar anterior lobe exerted some influence on posture as well as on the dynamic characteristics of vestibulospinal (VS) reflexes evaluated by. (1) Experiments are described in which the frequency transfer function of the vestibuloocular reflex in decerebrate cats is measured, for sinusoidal movements of the head about a vertical axis. (2) The frequency response is found to be flat over a range of frequencies from about 0.02 to 1 Hz The preparation (cat) has been decerebrate, all of the brain anterior to the posterior colliculi being removed. For purely spinal reflexes, the spinal cord has, in addition, been transected either in operation is a renewal of ascent broadly repeating the features of the initial ascent (fig. 2, B, C) much as in the mn. tetanus. This suggests. random from any four spinal responses are: 8-2a, 8 5a, 9 5a, 9 -O, while in the decerebrate response they are: 6 Or, 6'2a, 7 0a, 5 8a. In fig. 7, in which is shown the record of a spinal knee-jerk taken on a fast plate, the latency is 8'4a. In other preparations the decerebrate latency has varie

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Simultaneous bidirectional hindlimb locomotion in

The sensory and neural mechanisms underlying postural control have received much attention in recent decades but remain poorly understood. Our objectives were 1) to establish th Thermal Properties Holmes, page 1 Thermal Properties The following physiological properties were compiled by Professor Kenneth R. Holmes <krholmes@ux1.cso.uiuc.edu> and were published in part previously. n The tabulation includes values for both the native thermal conductivity of biomaterials (Appendix A) and the bloo Compare cars side by side to find the right vehicle for you. Compare car prices, expert and consumer ratings, features, warranties, fuel economy, incentives and more Studies were performed in six supine decerebrate, tracheotomized male cats weighing approximately 2 kg. Anesthesia was induced with 80 mg intramuscular ketamine. A stable anesthetic plane based on heart rate, blood pressure, and a lack of spontaneous movement, was maintained with 20-mg doses of intramuscular ketamine repeated as required, until.

Excitation of the extraocular muscles in decerebrate cats

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Analysis of temporal discharge characteristics of dorsal

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The locomotor discharge characteristics of ankle flexor

david burke, lyndsay knowles, colin andrews, peter ashby; spasticity, decerebrate rigidity and the clasp-knife phenomenon: an experimental study in the cat, bra We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies Feline leukemia virus (FeLV) is one of the most common infectious diseases in cats, affecting between 2 and 3% of all cats in the United States. Infection rates are significantly higher (up to 30%) in cats that are ill or otherwise at high risk (see below). Fortunately, the prevalence of FeLV in cats has decreased significantly in the past 25. Tortoiseshell cats with tabby patterns. Torties because of random color variation, but tabbies due to the patterns in the coloration. Torbies are also called patched tabbies. Brown Torby (Brown Spotted Torby) Patches of brown tabby and red tabby. Dilute Torby (Blue Classic Torby) Patches of blue tabby and cream tabby. Brown Torby and Whit

Find out more about common cat behavior issues to help you address some of our feline friends' behaviors and habits. Feline aggression and find out how to create peace between your cats. If your cat seems overly aggressive, there could be several reasons for his or her behavior. Cats enjoy scratching for many reasons, including stretching. The Google brain assembled a dreamlike digital image of a cat by employing a hierarchy of memory locations to successively cull out general features after being exposed to millions of images

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