PPT-Introduction to Sensory Receptors

Exercise 20 BI 232 Introduction and Terminology There are many types of sense receptors in the body They are not uniformly distributed Punctate distribution is the pattern of uneven distribution throughout the body. In all sensory receptors the stimulus causes a change in membrane permeability causing a generator potential However many sensory r eceptors photoreceptors cochlear hair cells and vestibular hair cells do not produce action potentials as a result . & Hearing. Chapter 7. Sensation and Perception. SENSATION: the psychological experience associated with sound, light, or other simple stimulus and the initial information-processing steps by which sense organs and neural pathways take in stimulus information from the environment. The function of the sensory organ. Detect stimuli or changes in the environment. Pass the impulse to the brain for interpretation then followed by action (respond) if necessary. . Provide the ability to protects us from harm or injury. الاحساس اللمسي. of Touch, Pressure, and Vibration. . Although touch, pressure, and vibration are frequently classified as sepa­rate sensations, they are . all detected by the same types of receptors. الاحساس اللمسي. of Touch, Pressure, and Vibration. . Although touch, pressure, and vibration are frequently classified as sepa­rate sensations, they are . all detected by the same types of receptors. PowerPoint® Lecture Slides prepared by Jason LaPres. Lone Star College - North Harris. Copyright © 2010 Pearson Education, Inc.. 9-1: . Sensory receptors connect our internal and external environments with the nervous system. Assistant Professor. MBBS, . Mphil. Stimulus & Modalities. A . stimulus . is a change detectable by the . body.. Stimuli . exist in a variety of energy forms, or . modalities, . such as heat, light, sound, pressure, and chemical changes. Dr. Kane. Sensation. Definitions. Somatosensory. Sensory Integration. Purposes (3). Feedback vs. Feed forward. Why do we test for Sensation?. Pattern. Completeness. CNS vs. PNS. Dermatomal. , glove and stocking = PNS. is. afferent neuron.. (b) Receptor . regulates. afferent neuron.. To CNS. Afferent. neuron. Afferent. neuron. To CNS. Receptor. protein. Sensory. receptor. Stimulus. Neurotransmitter. Sensory. receptor. Afferent Division of the Nervous System. Receptors. Sensory neurons. Sensory pathways. Efferent Division of the Nervous System. Nuclei. Motor tracts. Motor neurons. Figure 15-1 An Overview of Events Occurring Along the Sensory and Motor Pathways.. Dept. of Physiology. SKHMC. Definition. Sensory nerve endings that terminate in periphery as bare . unmyelinated ending. s. Capsulated structures. Biological transducers. Convert various forms of energy into action potentials. Sensory Receptors I. Sensory Receptors II. What. ’. s Your Perception?. Stop and Ask for Directions. Information Superhighway. $200. $100. $300. $400. $500. $100. $200. $300. $400. $500. $100. $200. Autonomic Nervous System. Outline the main structural and functional differences between the somatic and autonomic nervous systems.. Identify the structural features of the autonomic nervous system.. Dr. Salah Elmalik. Objectives. By the end of this lecture students are expected to:. Identify the major sensory receptors & pathways. Describe the components, processes and functions of the sensory pathways.