Biomedical subjects
Publications and source records attributed to S E Jacobs.
Varying perceptions of gender, sex, and sexuality are investigated, using several examples, from the Pokot of East Africa to the Tewa Indians in New Mexico. The role that labels play in the acquisition of gender identity is also explored; and the influence of Cartesian dualism is challenged, suggesting a need to expand Euro-American conceptions of gender.
Acetylcholine (ACh) has been suggested to play a crucial role in normal cortical functioning. To assess the impact of cortical ACh depletion on metabolic activity in the barrel field of rat somatosensory cortex, unilateral lesions of the basal forebrain were made. One to 9 weeks later, a 2-deoxyglucose experiment was conducted. Stimulus-evoked metabolic activity in the barrel field ipsilateral to the lesion was significantly reduced compared with the contralateral side. These results suggest that ACh plays a significant role in processing stimulus-evoked sensory information.
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Changes in tonic accommodation and tonic vergence were monitored before, during and immediately after a 45 min period of reading adult level text displayed on either a computer monitor or hard copy at 20 cm under binocular viewing conditions. Both tonic accommodation and tonic vergence gradually increased during the reading period, with changes in tonic accommodation occurring more rapidly. The average increases in tonic accommodation and tonic vergence following reading were 0.35 dioptres and 0.38 metre angles, respectively. Decay of both tonic components to the baseline in either light or total darkness occurred within the first 3 min. These results suggest that a moderate period of interrupted reading at a close distance can produce a transient increase in the tonic oculomotor levels.
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