DYNAMIC RESPONSE OF SINGLE NEURONAL UNITS TO FREQUENCY-MODULATED AUDITORY STIMULI IN THE UNANAESTHETIZED ANIMAL
Annual technical rept. no. 1, 1 Jan-31 Dec 1962
BIRMINGHAM UNIV (UNITED KINGDOM)
Pagination or Media Count:
The study of the dynamic, as opposed to the steady state, properties of the auditory pathway. To this end, and specifically, the response of single units in the auditory cortex of the un anaesthetised unrestrained cat have been recorded under various types of acoustic stimulation. A generator was designed which would provide audio frequency stimuli capable of being modulated in respect of both frequency and amplitude in any desired manner. A major problem was to obtain adequate frequency modulation free from any significant accompanying amplitude modulation. Records were made by means of micro-electrodes operated by a micro-manipulator attached to the cats skull. The cat was placed in a spacious cage situated in the anechoic test-room. The stimuli and responses were recorded on magnetic tape and subsequently transferred to film. Records were obtained from 91 units in various parts of the auditory cortex.
- Anatomy and Physiology