Distracted driving is the act of driving while engaged in other activities—such as looking after children, texting, talking on the phone or to a passenger, watching videos, eating, rubbernecking or reading. These activities take the driver’s attention away from the road. All distractions compromise the safety of the driver, passengers, bystanders and those in other
Hemispatial neglect, also called hemiagnosia, hemineglect, unilateral neglect, spatial neglect, contralateral neglect, unilateral visual inattention, hemi-inattention, neglect syndrome or contralateral hemispatialagnosia, is a neuropsychological condition in which, after damage to one hemisphere of the brain is sustained, a deficit in attention to and awareness of one side of the field of vision is observed. It
A monothematic delusion is a delusional state that concerns only one particular topic. This is contrasted by what is sometimes called multi-thematic or polythematic delusions where the person has a range of delusions (typically the case of schizophrenia). These disorders can occur within the context of schizophrenia or dementia or they can occur without any
Picture of the ventral and dorsal streams. The ventral stream is depicted in purple and the dorsal stream is depicted in green. Agnosia is the inability to process sensory information. Often there is a loss of ability to recognize objects, persons, sounds, shapes, or smells while the specific sense is not defective nor is
Allochiria is most frequently associated with a lesion of the right parietal lobe (in yellow, at top) Classification and External Resources Allochiria (from the Greek meaning “other hand”) is a neurological disorder in which the patient responds to stimuli presented to one side of their body as if the stimuli had been presented at
Anosognosia (/æˌnɒsɒɡˈnoʊziə/, /æˌnɒsɒɡˈnoʊʒə/; from Ancient Greek ἀ- a-, “without”, νόσος nosos, “disease” and γνῶσις gnōsis, “knowledge”) is a deficit of self-awareness, a condition in which a person with some disability seems unaware of its existence. It was first named by the neurologist Joseph Babinski in 1914. Anosognosia results from physiological damage to brain structures, typically
Blindsight is the ability of people who are cortically blind due to lesions in their striate cortex, also known as primary visual cortex or V1, to respond to visual stimuli that they do not consciously see. The majority of studies on blindsight are conducted on patients who have the conscious blindness on only one side
Five senses and the respective sensory organs inherent among Homo sapiens A sense is a physiological capacity of organisms that provides data for perception. The senses and their operation, classification, and theory are overlapping topics studied by a variety of fields, most notably neuroscience, cognitive psychology (or cognitive science), and philosophy of perception. The
Human olfactory system. 1: Olfactory bulb 2: Mitral cells 3: Bone 4: Nasal epithelium 5: Glomerulus 6: Olfactory receptor neurons Olfaction is a chemoreception that forms the sense of smell. Olfaction has many purposes, such as the detection of hazards, pheromones, and food. It integrates with other senses to form the sense of flavor.
The somatosensory system is a part of the sensory nervous system. The somatosensory system is a complex system of sensory neurons and pathways that responds to changes at the surface or inside the body. The axons (as afferent nerve fibers), of sensory neurons connect with, or respond to, various receptor cells. These sensory receptor cells
Organ of Golgi (neurotendinous spindle) from the human tendo calcaneus. The Golgi tendon organ (GTO) (also called Golgi organ, tendon organ, neurotendinous organ or neurotendinous spindle) is a proprioceptive sensory receptor organ that senses changes in muscle tension. It lies at the origins and insertion of skeletal muscle fibers into the tendons of skeletal
Siblings laugh as they are tickled Haptic communication is a branch of nonverbal communication that refers to the ways in which people and animals communicate, and interact via the sense of touch. Touch or Haptics, from the ancient Greek word haptikos is extremely important for communication; it is vital for survival. The sense of
Sensory maps are areas of the brain which respond to sensory stimulation, and are spatially organized according to some feature of the sensory stimulation. In some cases the sensory map is simply a topographic representation of a sensory surface such as the skin, cochlea, or retina. In other cases it represents other stimulus properties resulting
The Somatosensory Rehabilitation of Neuropathic Pain, is a method whose aim is to treat conditions of a reduced sense of touch or sensation (hypoesthesia) in order to decrease neuropathic pain. Neuropathic pain, with a prevalency of 6.9% of the general population, represents an important public health problem. e.g. Carpal Tunnel Syndrome (CTS) concerns 2.7% of
In medicine and anatomy, the special senses are the senses that have specialized organs devoted to them: vision (the eye) hearing and balance (the ear, which includes the auditory system and vestibular system) smell (the nose) taste (the tongue) The distinction between special and general senses is used to classify nerve fibers running to and
Tactile illusions are illusions that affect the sense of touch. Some tactile illusions require active touch (e.g., movement of the fingers or hands), whereas others can be evoked passively (e.g., with external stimuli that press against the skin). In recent years, a growing interest among perceptual researchers has led to the discovery of new tactile
Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment. The resulting perception is also known as visual perception, eyesight, sight, or vision (adjectival form: visual, optical, or ocular). The various physiological components involved in vision are referred to collectively as the
Colorless, green, and red photographic filters as imaged (“perceived”) by camera Color vision is the ability of an organism or machine to distinguish objects based on the wavelengths (or frequencies) of the light they reflect, emit, or transmit. Colors can be measured and quantified in various ways; indeed, a person’s perception of colors is
Example of an Ishihara color test plate. With properly configured computer displays, people with normal vision should see the number “74”. Many people who are color blind see it as “21”, and those with total color blindness may not see any numbers. Specialty Ophthalmology Symptoms Decreased ability to see colors Duration Long term Causes
Visual agnosia is an impairment in recognition of visually presented objects. It is not due to a deficit in vision (acuity, visual field, and scanning), language, memory, or low intellect. While cortical blindness results from lesions to primary visual cortex, visual agnosia is often due to damage to more anterior cortex such as the posterior
The visual system includes the eyes, the connecting pathways through to the visual cortex and other parts of the brain. The illustration shows the mammalian system with anatomical terminology. The visual system is the part of the central nervous system which gives organisms the ability to process visual detail, as well as enabling the formation
The dorsal stream (green) and ventral stream (purple) are shown. They originate from a common source in the visual cortex The two-streams hypothesis is a widely accepted and influential model of the neural processing of vision as well as hearing. The hypothesis, given its most popular characterisation in a paper by David Milner and
Eye movement in two seconds. Eye movement includes the voluntary or involuntary movement of the eyes, helping in acquiring, fixating and tracking visual stimuli. Specific systems are used in maintaining fixation, when reading and in music reading. A special type of eye movement, rapid eye movement, occurs during REM sleep. The eyes are the
Object recognition is the ability to perceive an object’s physical properties (such as shape, colour and texture) and apply semantic attributes to it (such as identifying the object as an apple). This process includes the understanding of its use, previous experience with the object, and how it relates to others. Regardless of an object’s position