Week 9 HO.docx - BMSC 11001 Week 9 Chapter 15 Sensory Motor and Integrative Systems Learning Outcomes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Sensations

Week 9 HO.docx - BMSC 11001 Week 9 Chapter 15 Sensory Motor...

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Unformatted text preview: BMSC 11001: Week 9 Chapter 15: Sensory, Motor and Integrative Systems Learning Outcomes: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Sensations arise as a result stimulation, transduction, generation, and integration. Sensory receptors can be classified structurally, functionally, or by the type of stimulus detected. Somatic sensations include tactile sensations, thermal sensations, pain, and proprioception. The somatosensory and primary motor areas of the cerebral cortex unequally serve different body regions. Somatic sensory pathways relay information from sensory receptors to the cerebral cortex and cerebellum. Somatic motor pathways carry impulses from the brain to effectors. Wakefulness and memory are integrative functions of the brain. Impulses for smell propagate along the olfactory nerve to the brain. Impulses for taste propagate along the facial, glossopharyngeal, and vagus nerves to the brain. The eye is protected by eyelids, eyelashes, eyebrows, and a lacrimal apparatus. The eye is constructed of three layers and two chambers. Image formation involves refraction of light rays, change in lens shape, and constriction of the pupil. The neural pathway of light is photoreceptors, bipolar cells, ganglion cells, optic nerve, primary visual cortex. The three main regions of the ear are the external, middle, and internal ear. The pathway of sound is tympanic membrane, ossicles, oval window, cochlea, vestibulocochlear nerve, primary auditory cortex. Impulses for equilibrium propagate along the vestibulocochlear nerve to the brain Chapter 15 Sensation: Sensory Modalities: General senses: Special senses: Sensory, Motor and Integrative System Sensory function: Integrative function: Motor function: The Process of Sensation: Four events typically involved when a sensation happens: 1. 2. 3. 4. Three Structural Classes of Sensory Receptors: Classes based on location: Type of Stimulus: Mechanoreceptors – Thermoreceptors – Nociceptors – Photoreceptors – Chemoreceptors – Osmoreceptors – Sensory Receptors: Adaptation Somatic Sensations Tactile Sensations Thermal Sensations: Pain: Types of Pain: Fast pain: Slow pain: Localization of Pain: Proprioception: Proprioceptors: Somatic Sensory “Map” in the Cerebral Cortex: Somatic Motor “Map” in the Cerebral Cortex Somatic Sensory Pathways: Sensory Pathways: The Posterior Column Pathway Sensory Pathways: The Anterolateral Pathway Sensory Pathways to the Cerebellum Somatic Motor Pathways Upper Motor Neuron Pathways Modulation of Movement by the Basal Nuclei: Modulation of Movement by the Cerebellum: Integrative Functions: Wakefulness and Sleep Integrative Functions: Learning and Memory Integrative Functions: Memory Occurs in Stages Chapter 16 Special Senses Special Sense of Smell Anatomy of the Olfactory Epithelium Cells: Physiology of Olfaction: Odor Thresholds and Adaptation The Olfactory Pathway Special Sense of Taste Anatomy Of Taste Buds And Papillae Types of Papillae Taste Buds Physiology of Gustation Taste Thresholds and Adaptation The Gustatory Pathway Special Sense of Sight Eyelids: Eyelashes and Eyebrows: The Lacrimal Apparatus: Accessory Structures of the Eye Extrinsic Eye Muscles Anatomy of the Eyeball Retina Central Fovea Lens Image Formation: Photoreceptors of the eye: Photopigments: Hearing: Outer ear: Middle Ear Inner Ear: Physiology of Hearing Malleus Incus Stapes vibrating Helicotrema in oval window Cochlea Sound waves Perilymph 3 7 4 5 1 2 6 9 External auditory canal 8 8 Scala tympani Scala vestibuli Basilar membrane Spiral organ (organ of Corti) Tectorial membrane Vestibular membrane Cochlear duct (contains endolymph) Tympanic membrane Secondary tympanic membrane vibrating in round window Middle ear Auditory tube Physiology of Equilibrium: Otolithic Organs: Saccule and Utricle: + Static Semicircular Ducts + Dynamic The Equilibrium Pathway ...
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