Reflection Journal On Dissection

Response: That specific cranial nerve is the Hypoglossal (XII) nerve and it belongs to the Sensory Somatic nervous system.

activities of the skin, muscles and many peripheral tissues. This includes the 12 cranial nerves

Introduction: The purpose of this experiment is to evaluate the 4 cranial nerves that are used for vision and eye movement based on their functions by performing several tests. With that being said, there are 12 cranial nerves in the body. The first cranial nerve is known as Olfactory Nerve I. This nerve is used for smell.

The nervous system is a multiplexed body system that controls most other body systems directly or indirectly by sending and receiving signals through a complex system of nerves. As a whole, the nervous system can be broken down into the central nervous system (CNS) and peripheral nervous system (PNS). The CNS is composed of the brain and spinal cord while the PNS is composed of peripheral nerves that branch off of the spinal cord and continue to branch to reach the most distal points of the limbs. The PNS can be further broken down into the afferent and efferent division. The afferent division deals with information brought to the CNS from the nerve receptors. Furthermore, the afferent division breaks down into somatic sensory receptors whose

It also allows for the front part of the tongue to sense taste and the eyes to open and close. This nerve is located in the Fallopian canal of the skull, inferior to the ear and bilaterally connected to the muscles of the face. (PEDIACTRICS Vol. 112 No. 2, 2003). It is thought that with the incidence of Lyme disease, the inflammation correlated with the disease is the cause of Bell’s palsy because of the pressure it puts on this nerve.

There are 12 Cranial Nerves which all serve a very important purpose within each and every one of our bodies. The twelve cranial nerves are Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, and last but certain not least Hypoglossal. Each nerve plays a different role for example the Olfactory nerve gives sense to smell, and the Optic nerve gives us sense of vision. The Oculomotor give us the motor skills to adjust the size of our pupils, raise our eyelids, etc. This particular nerve is also parasympathetic to the pupil, which causes accommodation as well as constriction. Another nerve that has to do with our motor skills is the Trochlear nerve, which allows the eye

The trigeminal and facial cranial nerves at first seem to be tangled muscle and nerves. When actually they only get that way because of where they came from, and because they had previous function in our ancestors. There are 12 Cranial nerves that come from the brain. These nerves control our facial expressions and all basic actions of the face. The trigeminal and facial cranial nerves are the two cranial nerves that are the source for this misconception of chaos, for the have “very complex functions and take tortuous paths through the head to do their job” (Shubin

Since nerves are critical pathways that carry information from the brain to the extremities they are likely to be distributed throughout the entire body. The two types of nerves, motor and sensory perform different functions. Motor nerves perform the function of carrying information from the brain to the organs, muscles, and heart. Whereas the sensory nerves do the work of sending information from the body back to the brain for processing, including pain, touch, taste, temperature and other sensations.

The sensory receptor detects the presence of a stimulus in the skin, muscle, or other organ. The sensory neuron, which is also the afferent neuron, carries sensory information to the central nervous system. The integrating center is found only in gray matter of the central nervous system in the brain or spinal cord. This is where information is processed, and the motor command to stimulate the effector is initiated. The motor neuron, also called the efferent neuron, carries the motor command to the effector organ. Finally, the effector organ carries out the response to the stimulus, which may be to a muscle, gland or adipose tissue.

Cranial Nerve Palsy is defined as damage to the cranial nerves or their branches. It is caused by a number of medical conditions, including diabetes, hypertension, atherosclerosis, trauma, rise in intracranial pressure, multiple sclerosis, stroke, lumbar puncture, and neurosyphilis. There are twelve cranial nerves, and each of them can have a malfunction happen to cause some type of damage. These nerves go directly from the brain to various parts of the head, neck, and trunk, and some of them are involved in the special senses (such as sight, sound, touch, and taste). Others control muscles in the face and regulate the glands in the body. The nerves are named and numbered according to their location, and the order in which they are named and numbered is from the front of the brain to the back.

Cranial Nerve II (Occipital nerve) is also sensory and conveys visual input. Cranial Nerve III (Oculomotor), IV (Trochlear) and VI (Abducens) control eye movement. Nerves III ,IV and VI are motor types of nerves. The oculomotor nerve (III) moves the eye and raises the eyelids as well as adjusts the lens and pupils of the eye. The Trochlear nerve (IV) controls the movement of the eyeball. The Abducens nerve (VI) moves the eyeballs outward. Cranial Nerve V (Trigeminal) is mixed (a mix of motor and sensory) and is divided into 3 parts: ophthalmic, maxillary and mandibular. This nerve controls the muscles of the face associated with chewing. Cranial Nerve V also controls feelings of the skin including pain and temperature. Cranial Nerve VII (Facial) is also mixed and controls facial movements. The facial nerve also controls saliva and tear

The CNS contains the brain and spinal cord. Its main functions include: processing, integrating, and coordinating sensory information and motor instructions. The sensory data conducts information that is being processed from internal and external conditions the body is experiencing. Motor commands regulate and control peripheral organs (skeletal muscles). The brain functions under memory, emotions, learning, and intelligence. The PNS consist of the neural tissue found outside of the CNS. It functions in sending data to the CNS which motor commands are than carried out to the peripheral tissues/systems. Multiple nerve fibers send sensory data and motor commands in the PNS. The nerves that assist with transmitting data include the cranial nerves and spinal nerve. However, the PNS can be divided into afferent (to bring in) and efferent (to bring out) divisions of transferring data. The afferent division functions in bringing in sensory data to the CNS. Sensory structures are receptors that detect internal/external environmental change and adjusting accordingly. The efferent division functions in carrying out motor commands from the CNS to glands, muscles, and adipose tissue. The efferent division contains somatic

The fifth cranial nerve out of 12 is known as the trigeminal nerve. Cranial nerves are located in the brain and each have a different function. The trigeminal nerve is located in between the oculomotor nerve and the facial nerve. The trigeminal nerve performs sensor functions that involve the teeth, tongue, nose, and eyes and is covered by a myelin sheath. A myelin sheath is the protective coating that is usually found around nerves. Trigeminal neuralgia also known as TN, is a painful disease that affects the trigeminal nerve. The disorder causes severe, sporadic, sudden burning or shock-like face pain that can last as short as a few seconds to as long as two minutes per episode of pain. Patients suffering from the disorder may sometimes

The anatomy of the nervous system is called neuroanatomy. Which consist of two areas having special construction and abilities. This is basic formation of the nervous system which controls the way we think and act as a source of inside instructions on direction to our surroundings as human beings. The primary nervous system is developed from a basic hollow stem and that stem grows in size and disburses into other areas which would be your head with backbone and the nerves with sensors throughout the body. The head is made up of two cerebral hemispheres protected by a hard shell which is surrounded with a fluid that keeps your blood stream separated from it. The head and backbone is the

• vagus nerves- carry a wide assortment of signals to and from the brain, and they are responsible for a number of instinctive responses in the body.