Sensory maps and brain development the midbrain auditory nucleus had receptive fields independent of nature and intensity of the sound. Roger Sperry proposed a chemical gradient model for eye rotation and for neuronal wiring diagram. Retinal neurons and target cells had identification tags in the form of chemical gradients so that the projection of neurons would be orderly. For a topographic map of the visual world, the map first forms during neural development via molecular signals, such as chemospecific matching between molecular gradients. The molecular basis of sensory maps and brain development is a field that is being actively explored. The most recent work has
Office of the Privacy Commissioner for Personal Data the Data Subject. The ordinance was passed in 1995. Data subject refers to : Examples of data subject protected by this ordinance include name, address, phone number, identity card number, photo, medical record and employment records. The data user, who collects, holds, or process this data is liable for any unlawful or wrongful use of this data. In 2010, it was reported that Octopus Card issuer has made HK$44 million in the past 4 1/2 years by selling cardholder data. This was disclosed in a special hearing conducted by the personal data privacy commissioner. Octopus Holdings chief executive Prudence Chan