Olfactory Nerve There are twelve nerves in the cranium, each with a different function. They are: olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, spinal accessory, and hypoglossal, in that order. These are nerves that come directly from the brain to transport information from the brain throughout the body. Each nerve is named according to their function. These nerves have paths within the skull and without the skull. All these nerves are paired, meaning they are on both the right and left side of the body.
The first cranial nerve is the olfactory nerve. This is your sense of smell. The olfactory nerve’s receptors are located within the mucosa of the nasal cavity, or mucus membrane of the nasal cavity. Its sensory fibers extend through the ethmoid bone's cribriform plate, which is a part of the skull located behind the nose. This nerve is part of the nervous system, but it does not join the brainstem. This is true for the optic nerve as well. The olfactory nerve is the shortest cranial nerve within the head.
During olfactory development axons from the sensory
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Your nose can detect more than 10,000 smells. Your scent cells are renewed every thirty to sixty days. You can smell feelings of fear and disgust through sweat. Smell is the most ancient scent according to scientists. women have a more developed orbital prefrontal region of the brain, which means women have a better sense of smell. Humans have five to six million odor detecting cells, while dogs have about 220 million. Just like fingerprints, every person has their own distinct odor. This odor comes from the same genes that produce tissue type. Most things that interfere with olfactory senses are allergies and head injuries. Since your sense of smell and taste intertwine, often a problem with the olfactory nerve can interfere with how you taste your
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
Afferent nerves, since those are nerves that carry information from your sensory organs (eyes) to the CNS (your brain).
The facial nerve fibers originate from the pons, lateral to the abducens nerves (Marieb & Hoehn). Branches enter the temporal bone through the internal acoustic meatus; they run through the inner ear cavity with the bone before they emerge through the stylomastoid foramen (Marieb & Hoehn). The facial nerve is the motor nerve to all of the muscles of expression in the face; it is distributed by multiple branches as it innervates various facial muscles including: the platysma, buccinator, the muscles of the external ear, the digastric, and the stylohyoid (Gray, 1995). Parasympathetic fibers of the facial nerve innervate the the lacrimal glands of the eyes, nasal and palatine glands, and the submandibular and sublingual salivary glands (Marieb & Hoehn).
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.
A bunch of nerves put together is called the Nervous system. The Nervous system helps with body coordination and provides sensory information about external problems. The nervous system controls the brain, spinal cord, sense organs, etc. Without our nervous system, we would not be able to function, since
Dendrites are located on either one or both ends of a cell.The peripheral nervous system then takes the sensory information from the outside and sends the messages by virtue of neurotransmitters. Neurotransmitters are chemicals that relay signals through the neural pathways of the spinal cord. The neurotransmitter chemicals are held by tiny membranous sacs located in the synaptic terminals. Synaptic terminals are located at the ends of nerve cells. The release of neurotransmitters from their sacs is stimulated once the electrical nerve impulse has finished travelling along a neuron and reaches the synaptic terminal. Afterward, neurotransmitters travel across synapses thus stimulating the production of an electrical charge that carries the nerve impulse onward. Synapses are junctions between neighboring neurons. This procedure is reiterated until either muscle movement occurs or the brain picks up on a sensory reaction. During this process, messages are being transmitted from one part of the body onto the next. The peripheral and central nervous system are two crucial subdivisions of the nervous system. The brain and spinal cord make up the central nervous
The nose is divided into the right and left cavities and is lined with tiny hairs and mucous membrane, which secretes a sticky fluid, called mucus, which helps prevent dust and bacteria from entering the lungs. The nose moistens, warms and filters the air and is an organ, which senses smell. The naso-pharynx is the upper part of the nasal cavity behind the nose, and is lined with mucous membrane. The naso-pharynx continues to filter, warm and moisten the incoming air.
In Lynda Barry’s Common Scents, she considers scents a demon for many reasons. One reason being that everyone has his or her own scent preference and scent in general, yet we also judge the way that other people smell. When the woman whose house smelled like a fresh bus bathroom talking about the smells of different Asian people’s houses, Lynda notes that she was “free with her observations about the smells of others” (18). She sprays her house with disinfectant sprays and air fresheners, which to her smells better that whatever her house smelt like before, but to others, such as Lynda’s grandmother, these smells are too strong and are trying to hide the fact that not everything smells good all the time.
The human nervous system is divided into two parts, the central nervous system and the peripheral nervous system. The central nervous system, CNS, is just the brain and spinal cord. The peripheral nervous system, PNS, includes the nerves and neurons that extend outwards from the CNS, to transmit information to your limbs and organs, for example. Communication between your cells is extremely important, neurons are the messengers that relay information to and from your brain. Nerve cells generate electrical signals to transmit information.
The Sciatica nerve is the longest and widest single nerve in the human body. It begins in the lower back and runs through the buttock and down the lower
Scent is part of the five senses that are developed when an infant is still in the mother’s womb. It is processed by a part of the brain that correlates with memory, so at a young age an infant could differentiate who their mother is by scent. Odor is a sign and olfactory condition (Waskul & Vannini, 2008). As someone gets older they begin to develop scents they like and dislike. There are also scents that people find attractive and unattractive. When meeting another individual for the first time a human’s first instinct is to smell them without realizing it. For instance, have you ever sat by someone or hugged someone who smelled good or bad? If so, many people tend to associate the scent with attractiveness or unattractiveness depending on the level of smell. There have been many studies indicating that there is a strong correlation between odor and attractiveness. Although the scent is a universal and an undetectable smell it can influence the level of perceived attractiveness of another person.
From laundry detergent to perfume, room sprays to breath mints, everything now has a chemically produced scent to disguise the natural; modern culture has declared the embarrassment linked with body odor. On a night out or at a first date, men and women are both spritzing cologne and perfume and popping in chewing gum in an effort to smell pleasant and non-verbally communicate a message to the other. They are attempting to present themselves in a way they believe will appeal to the other and enhance the relationship. However, this very act proves that odors have the capability to affect our mood, perception, and
The nose can smell thanks to the ten million scent receptors that make up the Olfactory Epithelium(smell device). The Olfactory Epithelium is located about 7 cm up inside the nose.These receptors can differentiate from over 10,000 different smells. The receptors send signals to the Olfactory Bulb. Those signals then travel to the brain which interprets what you are smelling by combining the different signals of the receptors. Many parts of the brain are affected by these signals.
The nervous system is composed of all nerve tissue in the body. This organ system forms a communication and coordination network between all parts of the body. It plays a major role in everyday activities such as breathing, walking even blinking. It is made up of nerve tissues to receive and transmit stimuli to nervous centers and initiate response. Neurons are nerve cells that transmit signals from one location of the body to another. With damage to the nervous system the body would not be able to function properly. The body has to be well taken care of in order to insure proper regulation. The two anatomical divisions that work hand in hand to help regulate the nervous system are the central and peripheral nervous system. According to the Campbell’s seventh edition biology book the nervous system is the most intricately organized data processing system on earth. It is a complex collection of nerves and specialized cells.