Latency of the jaw-opening reflex in the premature, preweaning and adolescent pig (hanford strain miniature pig, Sus scrofa).
The jaw-opening (digastric) reflex was elicited by electrical stimulation of oral mucosa in miniature pigs (Sus scrofa) varying in age from 5 days premature to 101 days post-term. The latency of reflex electromyographic activity varied between 12-14 ms in the most immature animals and 9-11 ms in the oldest animals. The very long-latency digastric responses found in the immature young of nesting mammals were not seen in the relatively precocious young of this species.
Thexton
A J
AJ
Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA.
German
R Z
RZ
Crompton
A W
AW
D000375:Aging / Q000502:physiology*; D000818:Animals; D000831:Animals, Newborn; D000833:Animals, Suckling; D001903:Bottle Feeding; D004558:Electric Stimulation; D004576:Electromyography; D005502:Food; D008334:Mandible / Q000502:physiology*; D009061:Mouth Mucosa / Q000502:physiology; D009334:Neck Muscles / Q000502:physiology*; D011930:Reaction Time; D012018:Reflex / Q000502:physiology*; D013552:Swine; D013556:Swine, Miniature; D014059:Tongue / Q000502:physiology; D014886:Weaning