Definition: In medicine, a pseudolobar is a type of baroreceptor reflex that is considered to be an adaptation for maintaining blood pressure within a narrow range. It involves the release of norepinephrine and other neurotransmitters in response to changes in blood pressure, which can help regulate heart rate and blood flow to the brain. The term "pseudolobar" was first introduced by Dr. Robert L. O'Keefe in his 1985 book "Baroreceptors