2NEUROLOGICAL BASIS OF ALZHEIMER’S DISEASENeurological Basis of Alzheimer’s DiseaseThe human brain is an intricate modular structured organ, responsible for theentire nervous system of the body (Lewis, 2016). It consists of about hundred billionnerves, and is organized into distinct cortical areas for sensation, perception, andinformation, maintained through trillions of connections called synapses (Hoffman,2017). Though the brain’s cortical areas act individually (Fukushima et al., 2015),they may malfunction due to injuries, degeneration, and genetic flaws, therebyaffecting the neurobiological mechanisms to cause behavioral disorders (Hoffman,2017). Alzheimer's disease is one such neurological disorder that originates fromgenetic, environmental, and lifestyle factors that influence the brain in due course,leading to cognitive decline and memory loss (MacGill, 2016). Considering itsincreasing incidence in the aging people, this essay analyzes the neurological basis ofAlzheimer’s disease and the underlying biological bases of behavior.Alzheimer’s diseaseAlzheimer’s disease is a type of dementia that develops from the disruptions inthe neurological functions of the human brain. It affects nearly 80% of people over 65years old, creating problems in their memory, communication, emotion control,reasoning, decision making, concentration, and perception. Biologically, Alzheimer’soccurs when the proteins and fibers accumulated in the brain, tend to destroy the nervecells, blocking the nerve signals (Bernstein, 2016).Neurologically, it involves severalprocesses in the brain, and before delving deep into them, it is necessary to illustrate theanatomy of the human brain and its functions deriving sensation, perception, andprocessing of information.Anatomy of human brain

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