The Brain With David Eagleman Analysis

When damage to certain regions of the brain occurs, conditions may develop where one is able to register visual information but incapable to distinguish anything (Anderson, 2009). Consequently, difficulties with visual impairments can include an inability within the brain to interpret and or process visual information (Anderson, 2009). Thus, visual perception impairments or disorders typically refer to the inability to make sense of information received through sight (the eyes) (Weiten, 1998). One such visual perception disorder is visual agnosia.

Most individuals take for granted their ability to see. Eyesight is a major connection to the outside world; around 80 percent of impressions are through sight, meaning that only 20 percent are from the other four senses. The human eye has evolved over time to turn into what it is today. Through human’s needs for survival, the eye has changed to suit humans. Two of the most common types of eyes found in nature are the camera-type eye and compound eyes; the human eye fits into camera-type eyes because just like a camera lens focuses light onto something, the eye does a similar thing. The cornea, a structure in the front of the eye, focuses light onto the retina, and behind the cornea, is a colored membrane called the iris. It has an adjustable circular opening, the pupil, which expands or contracts to determine the amount of light that enters the eye.

When a person with normal hearing hears the sound travels along the ear then bounces against the ear drum. The eardrum, the bones inside, and the cochlea vibrate and move thousands of tiny hairs inside the ear. When these hairs move an electrical response occurs. This electrical response goes to the hearing nerve and then it is send to the brain.

Basically how sound travels through the ear is a process of many steps. The sound waves are gathered by the pinna and then funneled into the meatus. Those waves then begin to vibrate the tympanic membrane which in turn hits against the malleus. The ossicle bones then vibrate like a chain reaction. The footplate will hit the oval window which triggers the fluid in the cochlea to move. The movement sways across the different hair cells creating impulses that are sent to the brain through the eighth cranial nerve.

After being shown a picture of an elephant they eye will take the light that is reflected from the object and it will enter the eye through the pupil. Then the light will be focused by the cornea and the lens to form a sharp image of the elephant in the retina. The retina is the network of neurons that cover the back of the eye and contains the visual receptors for a person vision. The visual receptors are made up of cones and rods that contain light sensitive chemicals called visual pigments. Visual pigments reacht to light and cause a triggered electrical signals to occur. These electrical signals will then flow through a network of neurons and this network of neurons is what makes up a persons retina. After the flow through the network of neurons occurs the electrical signals will emerge from the back of the eye in the area

The term sensation is used when referencing the process of sensing the environment through taste, touch, sound, smell, and sight (Goldstein, 2014). Moreover, it is the process that occurs once the sensory receptor experiences stimulation, which in turn produces nerve impulses that are sent to the brain to be processed in its raw form, then perception comes into play (Goldstein, 2014). Perception is used to describe the way people interpret these sensations and tries to make sense of everything around them on a daily basis. Perception is the occurrences of the brain

The middle ear has three ossicles (tiny bones) the hammer, the anvil, and the stirrup that connect the middle ear to the inner ear. When sound enters your middle ear, it causes the ossicles to vibrate. These vibrations then move into the cochlea, which is filled with fluid. When the vibrations move the fluid that is in the cochlea, it stimulates tiny hair cells that respond to different frequencies of sound. After the tiny hair cells are stimulated, they direct the frequencies of sound into the auditory nerve, as nerve impulses. (ASHA 2013)

The optic nerve reaches from behind the eyes to the occipital lobe where this visual information can finally be interpreted into what we know as ‘seeing something’. It is at this point that it is useful as this is when colours can be perceived (Breedlove, 2010).

The human eye is a wonderful organ enabling us to perform all our daily tasks. The sense of sight allows to do almost all activities. There are countless activities including studying, cooking, driving, or playing an instrument. Other tasks that vision is helpful for would be communicating, working, making life a lot easier, which are very essential. Most people would agree that vision is more valuable than the rest. The eyes allow us to interpret colors and shapes. This happens after a long complex process, starting from the reflect of light on the objects to the eyes and ends up in the brain as images. Having a healthy eye is very important and improves the quality of a person 's life. In this paper points out the very common eye

The ears are one of the most complex and interesting systems thats human body has and the sounds we hear are actually in many different parts deflected, absorbed, and also filtered by our different body parts. It's then collected by our pinnae (the external part of or ears), whose dimensions further affect the sound on its way into ear. There, vibrations are translated into signals, which are interpreted by your brain. In the 1930s, two scientists at Bell Labs, Harvey Fletcher and Wilden A. Munson researched this process and what they discovered has changed and affected how we as humans understand the hearing process.

* Retina-is the light sensitive part of the eye. The part that converts the light stimuli into neural signals to be interpreted by the cerebral cortex. I will not discuss how the photoreceptors convert the light stimuli into electrical signals, since it involves bio-chemistry, a good description can be found in any physiology book. Light must pass through the neural layers of the retina before reaching the photosensitive layer which consists of rods and cones. The neural layer consist of ganglion cells and bipolar cells. The bipolar cells take the electrical from the photoreceptors to the ganglions cell which in turn form the optic nerve that connect the eye to the brain. The optic nerve and the blood circulation apparatus leave the eye at the optic disc or the blind spot. Named so because it has not photoreceptors. A special part of the retina crucial of acute vision is which does

The first area that a sound arrives at in its journey to be perceived is the outer ear. At this point, sound is being transmitted in terms of acoustic energy. The outer ear consists of two major parts, the pinna and the ear canal. The pinna serves as a funnel, where several of its cavities act as sound enhancing mechanisms. The ear canal acts as a quarter length resonator. What this means is that it enhances

Sitting in this classroom today, I can see different things around me, smell different smells around the room, feel the keyboard underneath my fingertips, taste the apple I had during lunch and hear all the different sounds coming from all different people in the room. I can say I know this to be true because we perceive the world through our five senses: sight, sound, taste, touch and smell. Knowledge is what we learn, what we gain from our own experiences and what we understand from other people’s interpretations. Our senses provide us with a journey, which we are able to take or reject.

In order to determine the “truth” of the senses, a knower has to first compare his sensory perceptions to his pre-existing knowledge and determine whether the information is congruent. However this process occurs without the knower realizing it. A knower does not question every sight, smell, sound, touch and taste, but rather accepts them in the context of his