Reflex

A DLSR slider is perhaps one of the most important pieces of equipment to today 's digital photographer. Perhaps the most exciting thing about today DSLRs is that they not only allow us to create breathtaking photos of a quality that has never been able to be done before, but they also let us expand out creative horizons into ultra high-quality video projects as well. Photographers have always wished or a way to bridge the gap between photo and video easily and with a DSLR that is finally able…

On October 4th, 1888, George Eastman had patented a new camera. This camera was incredibly easy to use, easy to carry, and affordable to middle class; costing about twenty five dollars for the camera and ten dollars for film and development. The camera was a black leather box about sixteen by nine by eight centimeters. It was handheld and had a fifty-seven millimeter lens. (Steidl 9) This camera was the Kodak Camera. In 1900 Eastman now came out with the Brownie Camera. It was a six-exposure…

#Hasselblad is designed as a specialist studio and field camera [写真挿入] Leica, Hasselblad, Rollei, and Linhof are my favorite adoring cameras. Especially, Hasselblad seems to have a strong image of a high fashion model. Viewing through a waist-level finder and looking at a photo model symbolize a typical stereotype of a professional photographer. # History of Hasselblad Hasselblad was established in Sweden. It has an origin of an aerial camera during the World WarⅡ and was officially…

ear. This reflex occurs when a loud sound is presented to the ear causing the tympanic membrane to stiffen and cause a change in immittance (Martin & Clark, 2012). When measuring the acoustic reflex threshold, we are measuring the softest sound that can cause a reflex of the stapedius muscle as well as the duration of time needed for the reflex to decay. The reflex is presented as a deflection, or a curve/dip, on the immitance monitor of the device used (Campbell, 2014). Acoustic Reflex…

as somebody suddenly stroking the baby’s head or movement, like placing a baby in a cot. The palmer reflex or sometimes known as the grasping reflex is another primitive reflex reflected when a baby tightens their grasp around an object or somebodies finger when placed in their hand. The palmer reflex starts to develop at 11 weeks from conception in the womb and is seen up to 2 – 4 months. This reflex develops into reaching out at an object while simultaneously closing a finger at the same time…

reactions are two different ways that the human body responds to external or internal stimuli. Reflexes are involuntary and send a message only through the spinal cord to act on a stimuli without any intervention from the brain. For example, sneezing is a reflex as it is an attempt to rid the body of possibly harmful particles (external stimulus) from entering the body. Another example would be immediately pulling the hand away after touching a hot (external stimulus) pot. All of these reflexes…

does the baby know how to do these movements. As I am taking a human development class and also have learned about infants reflexes, I could help them find out why the infant does what they do. The movements the infants do are called primitive reflex behavior. They are involuntary reflexes. Our lower part of the brain is what controls these reflexes. Reflexes are the first part of brain that develops and these reflexes are only active for a brief period. These primitive reflexes are…

1. The Jendrassik maneuver played a major role on the patellar reflex. One of the prevailing hypotheses has to deal with the alpha-gamma co-activation theory. It states that the alpha motor neurons activates the motor tone, which leads to the spindles providing feedback to the brain. This process is done by the gamma motor neurons, who are in charge of controlling the stimulation of the cerebellum. Also, both the alpha and gamma motor neurons meet at the same effector muscles. Furthermore, when…

initiation of the peristalsis reflex in a piece of guinea pig ileum through the stimulation of the stretch receptors, and subsequently demonstrate that the peristalsis reflex is neuronal in origin and not just a property of the muscle itself. Several drugs including lignocaine, atropine, hexamethonium, and nicardipine were induced to a piece of guinea pig ileum under a standard hydrostatic pressure of 5.0 cm/H2O, and hence the effects determined that the peristalsis reflex is dependent on…

Describing the Roles of Sensory Receptors, Sensory Neurons and Specialized Sensory Receptors Sensory neurons are nerve cells within the nervous system that convert external stimuli from an individual’s environment into internal electrical impulses that can be transmitted from one neuron to another. For example, taste buds located in our mouth are sensory neurons that work with olfactory receptors in order to determine the flavour of the food. They are able to do this, in simple terms, because a…