Overview of Sensory Receptors Agenda Somatosensory touch proprioception

Overview of Sensory Receptors

Agenda • Somatosensory (touch, proprioception) • Vestibular • Auditory • We will cover vision later

Somatosensory Receptors

Diversity • Touch Cutaneous Mechanoreceptors • Pressure • Vibration • Proprioception > mm, tendons & joints Mechanoreceptors • Heat • Cold Nociceptors (Free nerve endings) • Pain

Interneuron Primary Basic Idea (using pain receptor as an example) Primary Perception, Localization, Interpretation Primary Sensory Neuron (PNS) Transmission Second Order Sensory Neuron (CNS) Transduction Reception

Cutaneous Mechanoreceptors Purvis, 2018, Figure 9. 5

Purvis, 2018, Table 9. 2

Proprioception • Muscle Spindles • Golgi Tendon Organs • Joint Receptors

Proprioception in Muscle Tissue Muscle Spindle: detect change in muscle length Golgi Tendon Organ: detect muscle tension Proprioception in Joint Capsule Joint Receptors: finger ROM

Vestibular Sense Rotation!

Axial planes Axis Runs thru body Rotation Plane it rotates in Canal Otolith Organs x y Side to side Top to bottom somersault pirouette frontal Transverse (horizontal) Ant and post Horizontal Utricular Saccular z Front to back cartwheel sagittal Ant and post both From UBC video Balance: https: //youtu. be/RLYAn. Fgu-YI

Pairs: Horizontal and Horizontal Left Anterior and Right Posterior Right Anterior and Left Posterior

Auditory Sense

Cochlea

Cochlear Implant

References Krebs, C. , Inglis, T. , Oyedele, O. , Rothman, Z. , Parry, M. , Taha, Y. , Leong, M. , Blumer, P. , Hayes, B. , & Rheaume, A. (2018). Balance [Video series episode 1, season 3]. In Neuroanatomy. University of British Columbia Medicine. Purves, D. , Augustine, G. , Fitzpatrick, D. , Hall, W. , La. Mantia, A. , Mooney, R. , Platt, M. and White, L. (2018). Neuroscience (6 th ed. ). Sunderland, MA: Sinauer Press.