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Premature visual stimulation accelerates intersensory functioning in bobwhite quail neonates
1Department of Psychology, Virginia Polytechnic Institute and State University, Blacksburg 24061.
Insights
Premature visual stimulation in quail chicks disrupts normal auditory development. These chicks need earlier sensory input to form species-specific attachments, highlighting the importance of developmental sensory limitations.
Area of Science:
- Neuroscience
- Developmental Psychology
- Animal Behavior
Background:
- Sensory systems develop sequentially in neonates.
- Early sensory experiences can influence later sensory processing.
- Prenatal sensory stimulation is an emerging area of research.
Purpose of the Study:
- To investigate the impact of prenatal visual stimulation on postnatal auditory development in bobwhite quail chicks.
- To determine if early visual input affects the development of auditory preferences.
- To explore the role of intersensory development in response to altered sensory input.
Main Methods:
- Bobwhite quail eggs were exposed to patterned light 24-36 hours before hatching.
- Hatchlings were tested for auditory preference for the maternal call at 24 and 48 hours post-hatching.
- Chicks were also tested for preferences for auditory and visual features of the bobwhite hen.
Main Results:
- Chicks exposed to prenatal visual stimulation did not show a preference for the maternal call.
- This lack of auditory preference was observed at both 24 and 48 hours post-hatching.
- Prematurely stimulated chicks required earlier species-typical sensory input to direct filial behavior.
Conclusions:
- Prenatal visual stimulation can alter postnatal auditory functioning in precocial birds.
- Developmental limitations on sensory input are crucial for early sensory-perceptual organization.
- The findings underscore the importance of natural sensory timing in development.
Abstract:
Recent evidence from both altricial and precocial neonates suggests that premature stimulation of a later developing sensory system may alter the functioning of earlier developing sensory systems. The present study examined the influence of prenatal visual stimulation on postnatal auditory functioning in precocial bobwhite quail chicks. Hatchlings that experienced patterned light during the 24-36 hr prior to hatching did not exhibit a naive auditory preference for their species-specific maternal call at 24 hr or 48 hr following hatching, a reliable phenomenon in chicks not receiving embryonic visual stimulation. To examine whether this lack of responsiveness resulted from enhanced intersensory functioning, hatchlings were tested for preference for both auditory and visual features of the bobwhite hen. Results indicate that prematurely stimulated chicks require species-typical auditory and visual stimulation earlier in postnatal development than do normally reared chicks to direct their filial behavior. These findings point to the importance of normally occurring developmental limitation of sensory input to early species-typical sensory/perceptual organization.