Hole's Anatomy and Physiology

1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 12 Lecture PowerPoint

2. 2401 Anatomy and Physiology I Chapter 12 Susan Gossett [email_address] Department of Biology Paris Junior College

3. Hole’s Human Anatomy and Physiology Twelfth Edition Shier  Butler  Lewis Chapter 12 Nervous System III: Senses Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

6. Pathways From Sensation to Perception (Example of an Apple)

13. Touch and Pressure Receptors Epidermis Dermis (a) (b) (c) Section of skin Free nerve endings Epithelial cells Sensory (afferent) nerve fiber Epithelial cells Tactile (Meissners) corpuscle (touch receptor) Sensory (afferent) nerve fiber Lamellated (Pacinian) corpuscle (pressure receptor) Connective tissue cells Sensory (afferent) nerve fiber Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. © Ed Reschke

20. 12.1 Clinical Application Treating Pain

22. Stretch Receptors (a) Muscle spindle Skeletal muscle fiber Golgi tendon organ Tendon (b) Sensory (afferent) nerve fiber Sensory nerve endings Sensory (afferent) nerve fiber Connective tissue sheath Intrafusal fiber Skeletal muscle fiber Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

24. Summary of Receptors of the General Senses

27. Olfactory Receptors Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Nasal cavity Cilia (b) (a) Cribriform plate Olfactory area of nasal cavity Superior nasal concha Olfactory bulb Olfactory tract Nerve fibers within the olfactory bulb Olfactory receptor cells Columnar epithelial cells Cribriform plate

30. 12.2 Clinical Application Mixed-Up Senses: Synesthesia

32. Taste Receptors Papillae (a) (b) Connective tissue Sensory (afferent) nerve fibers Epithelium of tongue Supporting cell Taste pore Taste hair Taste cell Taste buds Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

35. 12.3 Clinical Application Smell and Taste Disorders

44. 12.4 Clinical Application Getting a Cochlear Implant

46. Organ of Corti Cochlear duct Scala tympani Hair cells (a) (b) Basilar membrane Tectorial membrane Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. a: © John D. Cunningham/Visuals Unlimited; b: © Fred Hossler/Visuals Unlimited

47. Auditory Nerve Pathways Midbrain Pons Thalamus Auditory cortex (temporal lobe) Medial geniculate body of thalamus Superior olivary nucleus Medulla oblongata Vestibulocochlear nerve Cochlear nuclei Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

48. 12.5 Clinical Application Hearing Loss

49. Summary of the Generation of Sensory Impulses from the Ear

54. Crista Ampullaris Hair cell Supporting cells Sensory (afferent) nerve fibers Hairs Cupula Crista ampullaris (a) Head in still position (b) Head rotating Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. (c) Crista ampullaris Semicircular canal Endolymph Ampulla Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

64. Lens Conjunctiva Iris Lens Ciliary process Ciliary muscles Sclera Cornea Anterior chamber Vitreous humor Suspensory ligaments Posterior chamber Ciliary body Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Transparent, Biconvex , Lies behind iris, Composed of lens fibers, Elastic, Held in place by suspensory ligaments of ciliary body

72. Layers of the Eye

77. Rods and Cones Cones Rods Rod Cone (c) Many sensory (afferent) nerve fibers (b) Single sensory (afferent) nerve fiber (a) Retinal pigment epithelium Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. c: © Frank S. Werblin, PhD.

80. Rod Cells Mitochondria Nucleus Discs of membrane within cell Synaptic ending Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

82. Visual Nerve Pathway Optic tract Eye Fibers from nasal (medial) half of each retina crossing over Visual cortex of occipital lobe Lateral geniculate body of thalamus Optic chiasma Optic nerve Optic radiations Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

86. Quiz 12 Complete Quiz 12 now! Read Chapter 13.