Some mammals, particularly felids (cats) and ungulates (which includes horses, cattle, and pigs among other species), use a distinctive facial movement called the flehmen response to direct inhaled compounds to the VNO. The animal lifts its head after finding the odorant, wrinkles its nose while lifting its lips, and ceases to breathe momentarily.

Cats have a vomeronasal organ (or Jacobson’s organ) in the roof of the mouth with ducts that lead to the nose and the mouth. This is their “scent analyzer.”

Also known as the Jacobson’s organ, the vomeronasal organ (VNO) is a chemosensory tubular organ located between the hard palate of the mouth and the soft tissue of the nasal septum. The vomeronasal organ is an accessory olfactory system, best described as a taste-smell organ.

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2024年10月16日 · Here, we demonstrate that cat saliva contains predator cues that signal the imminence of predator threat and modulate the intensity of freezing behavior through the VNO in mice. Cat saliva activates VNO neurons expressing the V2R-A4 subfamily of sensory receptors, and the number of VNO neurons activated in response to saliva correlates with ...

VNO was affected by inflammation in 14/20 (70%) cats, and all the lesions were classified as chronic. Five out of 20 cats (25%) had documented intraspecific aggressive behaviours and 8/20 (40%) had shown aggression towards humans. Fisher’s exact test showed a statistically significant correlation between inflammation of the VNSE and

2023年11月9日 · Studies on the dog [283,323], domestic cat (Felis silvestris catus) , brown bear (Ursus arctos) , and European ferret (Mustela putorius) revealed that all share the main structural characteristics of the VNO, such as a cartilaginous capsule, the distribution of vessels around the vomeronasal duct forming the vascular pump, and a broad sensory ...

Background: The main goal of this work was to investigate the general distribution of arterial blood around and inside the vomeronasal organ (VNO) of the cat. Methods: Macro- and microdissection methods together with light and scanning electron microscopy were used. Heads were injected with an India ink/agar mixture (the VNO subsequently being ...

2017年3月1日 · In this work, a detailed morphological description of the postnatal development of the non-sensory epithelium (NSE) lining the vomeronasal duct (VND) of the female cat is provided using various...

In this work, a detailed morphological description of the postnatal development of the non-sensory epithelium (NSE) lining the vomeronasal duct (VND) of the female cat is provided using various histological techniques. The study focused on newborn, 2 weeks, 4 weeks, and 8 weeks of postnatal ages using four animals for each age.