The Influence of Stimulating The Neural Response on Physiological Response in Chicks

Abstract

The neural response in the chick is beginning during the development ofnerves and formation of the brain. At this stage, the chick begins todiscriminate and recognize the external stimuli, as sound, light, andheat...etc. In nature, the hen incubates eggs and released the sound forhearing to chicks inside the egg. The chick will gain comfort and safety forthe hen's feeling beside it. But in the artificial hatchery, there isn't thistechnical. So,  the hatcheries wereprovided with different sounds as external stimuli and studied the neuralresponse and physiological response. This study was carried out in Universityof Anbar, College of Agriculture, Animal Production Dept. by using 240fertilized egg (Ross 308), distributed to four treatments,T1= first treatmentcontrol treatment without hearing any sound, T2= second treatment hearing thehen call , T3= treatment third hearing  chicks hatched call and T4=treatment fourth hearing chick with hen call, each treatment divided into threereplicates and each repeater 20 eggs, hearing the sound from the age of 5 daysform incubation and until the day of hatching, the sound was given for a periodof 15 minutes per hour in 24 hours, with usually (100-200 Hz) sound density of 65 dB. the results showing: significantly (P≤0.01)improvement in neural response (motility of nerves ) and improvement inphysiological response (brain development, weight brain, and increasing growthhormone and prolactin hormone)