Axons of mitral cells pass directly back to the olfactory cortex on the ipsilateral side. Anterior commissure is a small commissure that connects the two halves of the olfactory system. Olfactory cortex is the portions of the cerebral cortex that receive direct projections from the olfactory bulb (via mitral cell axons) are collectively referred to as the olfactory cortex. It is located on the base of the frontal lobe and medial aspect of the temporal lobe. On the base of the frontal lobe it overlies the anterior perforated substance through which the striate arteries enter the interior of the brain.
An eye normally moves smoothly like a marble rolling over a glass plane, but an eye with jerk nystagmus moves like a marble rolling across sandpaper. Most types of nystagmus, including HGN, are involuntary motions, meaning the person with the nystagmus cant control it. In fact, the subject with the nystagmus is unaware that it is happening because the bouncing of the eye does not affect the subject's vision. There are several types of nystagmus. Alcohol causes two types: alcohol gaze nystagmus, which includes HGN, and positional alcohol nystagmus.
Sound waves travel through the fluid of the cochlea and make the hair cells in the organ of Corti move. The hair cells are the receptors for hearing. When the hairs bend, they cause an
c. You may be able to look through the cornea and see the iris, the colored part of the eye, and the pupil, the dark oval in the middle of the iris. At the back of the eye is the optic nerve. To see the separate fibers that make up the optic nerve, pinch the nerve with a pair of scissors or your fingers. If you squeeze the optic nerve, you may get some white goop. That is myelin, the fatty layer that surrounds each fiber of the nerve.
After sound passes through the oval window it reaches the inner ear, which is the innermost part of the ear. It consists of the fluid-filled cochlea, basilar membrane, organ of corti, tectorial membrane and hair cells. The cochlea consists of vestibular, middle and tympanic canals. After the sound reaches the cochlea, oscillation causes the fluid vibration, which in turn vibrates the basilar membrane, which
In Audacity, what do you use the Selection Tool for? You use the selection tool to click and drag to select part of a sound wave. 5. In Audacity, what does Noise Reduction let you do? Noise reduction allows you to choose how much volume of a noise to remove.
Cochlear Implant A cochlear implant is a small device that provides direct electrical stimulation to the auditory (hearing) nerve in the inner ear. It was developed to help children and adults with a severe to profound hearing loss who cannot be helped with hearing aids may be helped with cochlear implants. This type of hearing loss is called ‘sensorineural,’ which means there is damage to the tiny hair cells in the part of the inner ear called the cochlea. Because of this damage, sound cannot reach the auditory nerve. With a cochlear implant, the damaged hair cells are bypassed, and the auditory nerve is stimulated directly.
He clearly demonstrated spinal nerve carry both sensory and motor function and that sensory fibers transverse the anterior (Bell’s Law). He also demonstrated that the cranial nerve five was sensory to the face and motor to mastication, whereas cranial nerve seven controlled muscles of expression. Bell’s palsy is a form of temporary facial paralysis resulting from damage or an injury to the facial nerve. The facial nerve also called the seventh cranial nerve travels through a narrow, bony canal (called the fallopian canal) in the skull beneath the ear, to the muscles on each side of the face, Including those that control eye blinking and closing, and facial expressions such as smiling and frowning. When Bell’s palsy occurs, the function of the nerve is disrupted, causing an interruption in the message the brain sends to the facial muscles.
Etiology Retinal detachment can occur as a result of: * Shrinkage or contraction of the vitreous-the gel-like material that fills the inside of your eye. This can create tugging on the retina and a retinal tear, leading to a retinal detachment. * Injury * Advanced diabetes * An inflammatory eye disorder How retinal detachment occurs Retinal detachment can occur when the gel-like material (vitreous) leaks through a retinal hole or tear and collects underneath the retina. Reasons for holes or tears include: * Aging or retinal disorders can cause the retina to thin. Retinal detachment due to a tear in the retina typically develops when there is a sudden collapse of the vitreous, causing tugging on the retina with enough force to create a tear.
It has widespread connections with the rest of the forebrain and the midbrain. Partly through nerves and partly through hypothalamic hormones, the hypothalamus conveys messages to the pituitary gland, altering its release of hormones (Kalat, 2003). According to “American Accreditation Health Commission,” The hypothalamus is responsible for certain metabolic processes and other activities of the autonomic nervous system. It synthesizes and secretes certain neurohormones, often called hypothalamic-releasing hormones, and these in turn stimulate or inhibit the secretion of pituitary hormones. The hypothalamus controls body temperature, hunger, thirst, fatigue, sleep, and circadian cycle.