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GE CLST 73A Lecture Notes - Lecture 11: Perceptor, Inferior Colliculus, Superior Olivary Complex

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rubybat650
23 Feb 2017
School
UCLA
Department
General Education Clusters
Course
GE CLST 73A
Professor
Chandler, S.H.

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Document Summary

The skin is the sensory organ that contains these receptors. Transduction in the pacinian corpuscle occurs when nerve membrane stretched, allowing entry of sodium. Free nerve endings, embedded in the skin. Dorsal column system: how touch info gets to the brain. Axons for touch ascend in dorsal columns of spinal cord. Steps: stimulus crosses at the medulla, ascends to the thalamus (the relay), then goes to primary somatosensory cortex. Auditory system processes fluctuations in air pressure (sound waves) Vibrating objects generate sustained waves that you perceive as sound. These vary in amplitude, bigger amplitude is perceived as louder. Stapes punches it, vibrates cochlea, which is filled with fluid. Transduction takes place in the hair cells in the cochlea. Thin fibers called tip links run across each hair cell stereocilia. Vibration makes stereocilia sway, causing ion channels to open allowing positive ions to enter. The hair cell depolarizes, and calcium influx at the base of the cell causes neurotransmitter release.

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Related Questions

1.All peripheral sensory input enters the spinal cord through the 2.Mechanoreceptor afferents are divided into two main classes based on(Points : 2) 3.Branches of SAI afferents terminate in ____________ where they are proposed to be the site of ____________ transduction.(Points : 2) 4.SAI afferents appear to be used by the CNS to perceive(Points : 2) 5.AII afferents have ________ receptive fields and greater sensitivity to ________ than do SAI afferents.(Points : 2) 6.Somatosensory afferents from the muscle are sensitive to ___________ while afferents from the tendon are sensitive to ___________.(Points : 2) 7.Kinesthesia is obtained by convergent afferents of the muscles, tendons, joints and___________8.Nociceptors respond to ________ stimuli and sense through use of ___________.(Points : 2) 9.First pain is transmitted through ______ receptors that carry discriminative information, and second pain is modulated by _______ receptors.(Points : 2) 10.Acute skin damage is accompanied by ____________ that is the result of local activation of nociceptors leading to ________.(Points : 2) 11.Somatic sensation retains separation of mechanosensation and __________ from nociception and ___________ which is evident from PNS to CNS.(Points : 2)12.The primary somatosensory cortex has ventral projections to(Points : 2) 13.The dorsal stream of the somatosensory cortex project to(Points : 2) 14.The dorsal column nuclei are located(Points : 2) 15.The lateral cervical nucleus is located in the ____________ and display ___________ receptive fields.(Points : 2) 16.Non-perceptual input of nociceptors influence behavior by(Points : 2)17. sensory trigeminal system is composed of the...18.The receptive fields of secondary somatosensory cortical neurons are ___________ than those of the primary somatosensory cortex.(Points : 2) 19.Receptive fields in the primary somatosensory cortex are(Points : 2)I really need help with this please! The person who is able to help me with the CORRECT answers will be compensated with 3000 points! This assignment will be graded instantly by a computer so I will know if the person actually tried or if they just put in some crazy answers just to get the points. The points will be rewarded IMMEDIATELY after the assignment is graded, which, as I stated above is done instantly by the computer once submitted. At least 75 to 80% of the questions must be correct in order to receice all 3000 points today. Thank you SO much in advance!!! :)