8 1.2 Vestibule ‡ªìπÕ«—¬«–¿“¬„π™àÕßÀŸ™—Èπ„πΣ’ËΣ”Àπâ“Σ’Ë„π°“√§«∫§ÿ¡°“√Σ√ßμ—« ª√–°Õ∫ ‰ª¥â«¬ à«π ”§—≠§◊Õ Semicircular canals 3 ™‘Èπ ·≈– à«π¢Õß Saccule ·≈– Utricle Semicircular Canals π—Èπ¡’Õ¬Ÿà 3 ™‘Èπ §◊Õ Superior, Posterior ·≈– Lateral ´÷Ëß·μà≈–Õ—π®–Σ”¡ÿ¡©“°´÷Ëß°—π·≈–°—π ·≈–‡ªìπμ—«§«∫§ÿ¡°“√‡§≈◊ËÕπ‰À«„π≈—°…≥–À¡ÿπ√Õ∫ μ—«‡Õß (Rotational Positional Movements) Saccule ·≈– Utricle ‡ªìπ≈—°…≥–√ŸªΣ√ß°√–‡ª“– ¿“¬„π®–¡’ à«πΣ’Ë‡ªìπμ—« √—∫§«“¡√Ÿâ ÷° §◊Õ Otolith À√◊Õ Ear stones ´÷ËßÕ¬Ÿà¿“¬„π Maculae Σ’Ë¡’μ—« hair cell ¥“¥Õ¬Ÿà¥â«¬ ‡¡◊ËÕ¡’°“√‡§≈◊ËÕπ‰À«¢Õß»’√…–„π·π«¢÷Èπ≈ß·≈–·π«μ√ß ‡™àπ °“√¢÷Èπ≈‘øμåÀ√◊Õπ—Ë߉ª°—∫√∂Σ’Ë°”≈—ß«‘Ëß ®–¡’°“√ àß —≠≠“≥ª√– “Σºà“π‰ª Ÿà√–∫∫ª√– “Σ à«π°≈“ßμàÕ‰ªΣ“ß·¢πߢÕß Vestibular ‡¢â“ Ÿà‡ âπª√– “Σ ¡ÕߧŸàΣ’Ë 8 2. Membranous Labyrinth ‡ªìπ‡¬◊ËÕ¿“¬„πΣ’Ë¥“¥Õ¬Ÿà‡°◊Õ∫Σÿ° à«π¢Õß Bony Labyrinth ·≈–¡’¢Õ߇À≈« 2 √–∫∫ ∫√√®ÿÕ¬Ÿà §◊Õ perilymph ∫√√®ÿÕ¬Ÿà¿“¬πÕ° ·≈–¡’ Endolymph ∫√√®ÿÕ¬Ÿà¿“¬„π ´÷ËߢÕ߇À≈«π’ȇÕß Σ’ËΣ”„Àâ°≈‰°„π°“√ àߺà“π§≈◊Ëπ‡ ’¬ß¥”‡π‘π‰ª‰¥â ‚¥¬‡ª≈’Ë¬π®“° Mechanical pressure „π à«π ¢ÕßÀŸ™—ÈππÕ°·≈–™—Èπ°≈“ß ¡“‡ªìπ Hydraulic pressure „π à«π¢ÕßÀŸ™—Èπ„π ‚¥¬°“√‡§≈◊ËÕπ‰À« —Ëπ –‡Σ◊Õπ¢ÕßπÈ”®π‡ªìπμ—«°√–μÿâπ„À⇰‘¥°“√√—∫√Ÿâ„π°“√§«∫§ÿ¡°“√‡§≈◊ËÕπ‰À«μàÕ‰ª ‡ âπª√– “ΣΣ’Ë ”§—≠„π à«π¢ÕßÀŸ™—Èπ„ππ’È §◊Õ ‡ âπª√– “Σ ¡ÕߧŸàΣ’Ë 8 (Acoustic or Auditory Nerve À√◊Õ∫“ßΣ’‡√’¬°«à“ Vestibulocochlear Nerve) ´÷Ë߇ªìπ‡ âπª√– “Σ√—∫§«“¡√Ÿâ ÷° Σ’Ëª√–°Õ∫‰ª¥â«¬ 2 à«πΣ’Ë ”§—≠§◊Õ Cochlear Branch ·≈– Vestibular Branch - Cochlear Branch √—∫°√–· ª√– “ΣΣ’Ë‡°’ˬ«°—∫°“√‰¥â¬‘π‡ ’¬ß¡“®“° Organ of Corti „πÀŸ™—Èπ„π ·≈â« àßμàÕ‰ª¬—ß ¡Õß„À≠à (Cerebral Cortex) à«π Primary auditory area ´÷Ëßμ—ÈßÕ¬ŸàΣ’Ë à«π∫π¢Õß°√–§Ÿ°¢¡—∫„°≈â°—∫√Õ¬∫ÿà¡„π‡π◊ÈÕ ¡Õߥâ“π¢â“ß (Lateral Sulcus) - Vestibular Branch √—∫°√–· ª√– “ΣΣ’Ë‡°’ˬ«¢âÕß°—∫°“√Σ√ßμ—«‚¥¬‡√‘Ë¡®“° Semicircular Canal, Saccule ·≈–Utricle „π°â“π ¡Õß ·≈–∫“ß à«π à߇¢â“ Ÿà ¡ÕßπâÕ¬ ´◊Ëß Σ—ÈßÀ¡¥π’È®–™à«¬§«∫§ÿ¡°“√Σ√ßμ—«¢Õß√à“ß°“¬„ÀâÕ¬Ÿà„π ¿“«–ª°μ‘ °“√欓∫“≈ ÀŸ §Õ ®¡Ÿ°
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