Sensory aging- summary

8 Pages
Unlock Document

University of Toronto Mississauga
Giampaolo Moraglia

Sensory experiences get worse as we get older. No other age related loss is as universal as sensory loss. All systems detect energy from the environment, which is picked up by special receptors located in an organ. This energy is converted into a signal. - Sensory Nerves: acoustic nerves= hearing, optic nerves= vision - Normal age related changes can also occur due to disuse, abusse - - impairment in sensory systems limits our interaction with the world - Without these senses, we feel disoriented, degraded input for vision and hearing affects how we code information and respond to information. - There are 3 main layers: sclerotic coat, choroid, retina - Lense divides the insde of the eye: the inner part is called the Aqueous humor and the outside is called the Vitreous humor - the eye is a spherical shape - Sclerotic coat- is a hard tissue, helps the eye preserve its shape bevcause fluids existing in the eye create a pressure, therefore a hard coating is needed to withstand this pressure - Choroid: made by a network of blood vessels which carry oxygen and nutrients - It has structures that make fluids. The centre of the eye is the iris- pigmentiation represents the colour of the eye - - it is responsible for dilating th size of pupils to avoid allowing too much light to enter. If luminense decreases, the pupil increases by 4 times to let more light in. - the size of the pupil is affected by emotional factors - Retina: is like a small fishernet, it is made by cells, is the screen onto which an image of the world is projected. It contains rods and cones- particles of light. - Axis of ganglion cells make up the optic nerve. - Anterior (aqueous humor)- is like a water chamber- it carries nutrients to various structures and removes waste that is created by activities occuring in the eye. In a normal eye, this input and output is a perfect balance. (in terms of how much liquid is mae and released)
More Less

Related notes for PSY313H5

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.