Head movements

At the higher doses, several stages of stereotyped behaviors were seen. The transition from amphetamine-induced locomotion to locomotion associated with stereotyped side-to-side head movements was accompanied by a further reduction in firing rate. In those animals in which focused stereotypy was observed following this period of locomotion plus head movements, neurons showed a still further reduction in firing rate (figure 2). 

NOTE Amphetamine-induced inhibition of neostriatal unit firing during postdrug compared to predrug locomotion may be clearly observed. As locomotion gives way to locomotion with stereotyped side-to-side head movements, there is a further decline in firing rate. When... 

Hair cells are specialized mechanoreceptors located in the inner ear these cells transduce mechanical forces transmitted by sound and head movement, and permit an organism to sense features of the external world. Well-characterized biophysically, a molecular description of hair-cell transduction has finally begun to emerge. 

An individual who was blind in regard to the odour stimulus presented at each trial repeatedly viewed each test session and scored the following behavioural measures number of lateral head movements, number of hand-to-mouth movements, and frequency of sucking movements with the lips / mouth. 

AntivertigO effect. Powdered rhizome, administered orally to human adults at a dose of 1 g/person, was active vs seasickness ° k Rhizome, administered orally to adults of both sexes at a dose of 1 g/person, was inactive. The treatment was administered 2 hours before the subjects were rotated in a chair making head movement until a symptom short of vomiting was reached ° Antiviral activity. Aqueous low-speed supernatant of the rhizome, at a concentration of 1% and the rhizome juice, produced strong activity on virus-top necrosis h Decoction of the rhizome together with c at a concentration of 250 pg/mL, was active on HlV-1 and Rauscher murine leukemia viruses. Reverse transcriptase activity was inhibited . Water extract of the rhizome, in cell culture at a concentration of 10%, was inactive on herpes virus type 2, A2-... 

The extracellular microelectrode recording technique developed by David Hubei for his epochal studies of the cat visual system and further perfected by Eduard Evarts for his pioneering work on the cat motor system was easily applied to exploring the brain stem. There were two major obstacles that needed to be overcome to guarantee success, however. The first was movement not only was head movement itself a problem, but body movement also had to be limited because the targets were deep and located on the major axis of lateral and vertical head-on-neck movement. The second problem was identification of the neurons of interest. At the onset, no one knew that the modulatory elements would identify themselves both by their distinctive spike-to-spike firing pattern, but also—and this is the main point of the discovery—by their dramatic state dependent alterations of firing propensity. 

Irving, M., Lombardi, V., Piazzesi, G., and Ferenczi, M. A. (1992). Myosin head movements are synchronous with the elementary force-generating process in muscle. Nature 357, 156-158. 

Martin-Femandez, M. L., Bordas, J., Diakun, G., Harries, J., Lowy, J., Mant, G. R., Svennson, A., and Towns-Andrews, E. (1994). Time-resolved X-ray diffraction studies of myosin head movements in live frog sartorius muscle during isometric and isotonic contractions./. Mus. Res. CellMotil. 15, 319-348. 

Stereotypy Presence Abnormal repeated movements Sniffing Chewing Head movements... 

Carotid loops may be associated with aneurysm formation and rarely with embolism, endothelial damage and thrombosis exceptionally there may be focal ischemia on head movement (Sarkari et al. 1970 Desai and Toole 1975). Rarely, these loops may cause hypoglossal nerve lesions or pulsatile tinnitus. 

Head movement sensor Eyelid movement sensor mount Eyelid sensor lead Eyelid sensor with adhesive backing Bandanna (worn "pirate style")... 

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