The Optic cranial nerve is located in the eye. Its function is to provide us with vision. This particular cranial nerve is a sensory nerve. The hypoglossal cranial nerve supplies the muscles of the tongue and allows movements of the tongue to form things like speech and swallowing. This is a motor cranial nerve because it provides our tongue to move. The facial cranial nerve is mixed. Its sensory fibers are concerned with taste via taste buds in the front of the tongue. It also has motor fibers that control tears via the lacrimal glands around our eyes. These nerves also allow for muscles in our face to move and we can have facial expressions. The vagus cranial nerve is also mixed. Its sensory fibers allow for monitoring blood pressure and
Purpose- To identify the functions of the cranial nerve of the peripheral nervous system such as the olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, and the hypoglossal nerves. I will examine these functions with a series of behavior tests on my partner who is Jazmine Cooley to see if all nerves are functioning properly and if they are not, then this will be considered an identified dysfunction of a cranial nerve which is a diagnosis.
present in the cell bodies of the facial nerve in persons who do not have
Helplessness is a category of psychological sickness that makes people feel lugubrious and desperate to despair imprisonment from freedom. The Third Eye, which can be also called metacognition, is an asset that people have the inner critique to think about the way they behave responsibly and maturely.
Introduction: This report is to discuss an experiment to assess the sensory and motor functions of the facial nerve in humans. The facial nerve is one of twelve cranial nerves that innervates the head and neck. These nerves serve a variety of functions, both sensory and motor, and are responsible for moving the muscles in the face, head and neck, and receiving information the brain can interpret into all five sense. Appendix A outlines each cranial nerve, it’s sensory and/or motor function, and the foramen in the bones of the skull it passes through.
The 84 year old woman is experiencing several symptoms that would indicate that she has suffered an injury to her third cranial nerve, also known as the oculomotor nerve. The oculomotor nerve is responsible for eye movement, allows the pupil to constrict, and allows the person to focus on near objects such as reading. This ability to focus is also known as accommodation.
Retinitis pigmentosa is a genetic disorder that causes blindness in the people that are affected by it. I chose retinitis pigmentosa because my grandmother has this genetic disorder. The disorder is very costly on those who have it. The disorder has robbed my grandmother of the life she wanted. She is no longer able to do the things she once was. She is legally blind, cannot drive, and has trouble getting around crowded areas. Retinitis pigmentosa was discovered by Doctor Donders in 1857. Retinitis pigmentosa is a very serious disorder in how it occurs, its signs and symptoms, its prevalence, and how its treated.
Let’s say that there is a mechanical sense. If someone touched your hand, your somatosensory system will detect various stimuli by your skin’s sensory receptors. The sensory information is then conveyed to the central nervous system by afferent neurons. The neuron’s dendrites will pass that information to the cell body, and on to its axon. From there it is passed onto the spinal cord or the brainstem. The neuron's ascending axons will cross to the opposite side either in the spinal cord or in the brainstem. The axons then terminates in the thalamus, and on into the Brodmann Area of the parietal lobe of the brain to process.
Firstly, there is various of sensing activities as in seeing and hearing as in a sense of understanding of what is seen and heard. Secondly the sense of feeling in numerous parts of the body from the head to the toes. The ability to recall past events, the sophisticated emotions and the thinking process. The cerebellum acts as a physiological microcomputer which intercepts various sensory and motor nerves to smooth out what would otherwise be jerky muscle motions. The medulla controls the elementary functions responsible for life, such as breathing, cardiac rate and kidney functions. The medulla contains numerous of timing mechanisms as well as other interconnections that control swallowing and salivations.
When a message comes to the brain from body parts such as the hand, the brain dictates the body on how to respond such as instructing muscles in the hand to pull away from a hot stove. The nerves in one’s skin send a message of pain to the brain. In response, the brain sends a message back dictating the muscles in one’s hand to pull away from the source of pain. Sensory neurons are nerve cells that carry signals from outside of the body to the central nervous system. Neurons form nerve fibers that transmit impulses throughout the body. Neurons consists of three basic parts: the cell body, axon, and dendrites. The axon carries the nerve impulse along the cell. Sensory and motor neurons are insulated by a layer of myelin sheath, the myelin helps
The CNS, also known as the central nervous system, is the principle amalgamation system of the human body and is composed of the brain and spinal cord. In contrast, the PNS, also known as the peripheral nervous system, is composed of all neural tissue except the brain and spinal cord. These two systems work together, for example, sensory information makes its entrance into the CNS, which examines it and then transmits a motor reply via the PNS to muscular or glandular tissue. Furthermore, information arrives the CNS from the afferent division of the
Glaucoma is a degenerative eye disease that affects three million Americans, though only about half of them know it. The worst part is hat number continues to grow as the at-risk population continues to increase. Do you know if you are at risk of developing glaucoma? Knowing who is at risk for this terrible disease can help reduce the numbers affected.
The sciatic nerve supplies information about movements of the leg and sends information about sensations back to the brain. The sciatic nerve is quite large, in fact, it is the largest peripheral nerve in the body.
Laila confirms that her friends have ordered pizza using her visual system. Through the sensation of light, sensory information is processed and Laila is then able to see the pizza. The pupil absorbs light, by allowing light to enter the eye, and light will then be transferred to the lens. The lens is responsible for refracting light and focusing the light inside of the eye, also known as the retina. The second cranial nerve, or optic nerve, is responsible for carrying the visual signal from the eye to the optic chiasm. The optic nerve, or second cranial nerve, is located in the back of the eye. This cranial nerve transfers visual information to visual centers in the brain through many electric impulses. The optic chiasm has temporal fibers that travel ipsilaterally as nasal fibers transmit information contralaterally, to the opposite side of the associated visual field. The visual cortex can then process sensory information from the opposite eye. Laila’s blind spot is where the optic nerve begins and there are no rod or cone cells in the optic nerve. The brain has to try to compensate for the lack of photosensitive
The three interconnected functions of the nervous system are sensory input, integration, and motor output. Sensory input is the conduction of signals from sensory receptors to the central nervous system. Integration is the analysis and interpretation of the sensory signals and the formulation of appropriate responses. The motor output function is the conduction of signals from the integration centers to effector cells, which performs the body’s responses. The central nervous system (CNS) consists of the brain and the spinal cord.
The Eye is the organ of sight. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he/she is really seeing is the light that the object reflects, or gives off.