NC227L Chapt.10

作業八：Chapter 10 Vestibular System 前庭系統

(Learning Objectives整理)

NC227L01

負責人：9580039 陳穎萱

Discuss the importance of the vestibular system in equilibrium.

【譯】討論前庭系統在平衡中的重要性

【內容】NC233 ~ NC234、Figure 10-6(page 233)、Figure 10-7(page 235)

NC227L02

負責人：9580040 黃宜樺

Describe the anatomy of the vestibular system

【譯】敘述前庭系統的解剖構造

【內容】大概在課本的NC227 ~ NC229

【補充】前庭系統由半規管、橢圓囊、球囊等構成，主要接收身體在運動或旋轉時的刺激，再將這些訊息經由第八對腦神經中之前庭神經傳遞至腦部，以維持身體的平衡感。所以當前庭系統不正常時，人的平衡感就可能出現問題，就有可能會頭暈。

【資料來源】http://www.cych.org.tw/cych/medknow/105/12.htm

NC227L03

負責人：9580042　黃宏舜

Describe the projections of the vestibular complex

【譯】描述前庭複雜的投影

projection: where do the nerve fibers go, how are they connected

vestibular complex = vestibular system

【內容】大約在課本230~23頁

【補充】The vestibular complex projects to other portions of the nervous system. The lateral vestibulospinal tract arises from neurons in the lateral vestibular nucleus (Deiter's) and projects through the ventral part of the lateral funiculus to activate extensor motor neurons at all levels of the cord. The medial vestibulospinal tract arises from the medial vestibular nucleus and projects through the descending medial longitudinal fasciculus (MLF) to enter the anterior funiculus of the spinal cord and affect neck muscle activity bilaterally. These vestibulospinal tracts adjust the muscle tone and position of the body in response to vestibular stimulation and are the physiological basis for vestibular righting reflexes and tonic neck reflexes.

In addition to projections to the spinal cord, there are projections from the vestibular complex to the reticular formation. Intense vestibular stimuli can produce vomiting and even influence blood pressure. Additionally, there are projections to the thalamus that relay to poorly-defined portions of the inferior parietal lobe that permit the conscious perception of movement.

【資料來源】http://www.dartmouth.edu/~rswenson/NeuroSci/chapter_7E.html

NC227L04

負責人：9580043　韓佳吟

Describe the mechanism of nystagmus

【譯】描述眼球震顫的機械作用

Mechanism: how it works, not necessarily mechanically, cf. NC227L05

【內容】 NC234中間有” Nystagmus”以及NC235F10-7有相關內容的介紹

NC227L05

負責人：9580045　張雅雯

Describe the mechanism of nystagmus.

【譯】解釋眼球震顫的機轉機制。

【內容】見課本第234頁Nystagmus 以及Induced Vestibular Eye Movements, or Nystagmus.

NC227L06

負責人：9580046　陳俊廷

Discuss the vestibular mechanism that controls rotational and ocular movements

【譯】詳述內耳前庭控制旋轉和視覺運動的機械作用

Mechanism: how it works, not necessarily mechanically, cf. NC227L05

rotational and ocular movements: (body) rotation & eye movement

【內容】P.232-235、Figure 10-6、10-7

NC227L07

負責人：9580047　王思婷

Explain methods used for assessing the integrity of the vestibular mechanism.

【譯】說明評價內耳前庭的機制完整性的方法。

assessing the integrity of the vestibular mechanism = check if the vestibular mechanism is OK, no defect, complete

【內容】NC235~NC236

NC227L08

負責人：9580048　許舒琇

Discuss common vestibular dysfunctions

【譯】描述說明常見的前庭功能異常。

【內容】NC234~NC235。

1.Motion Sickness: The most common disorder of the vestibular system, is characterized by vertigo, the subjective sensation of body rotation. It is also associated with dizziness or light-headedness, nausea ,and vomiting.

2.Vertigo:The sensation of spinning through space(subjective vertigo)can be very disabling. .Ménière disease,a conditition of obscure orgin characterized by abnormally high endolymphatic pressure and later by mixing of endolympf and perilymph secondary to a rupture in the vestibular apparatus.

3.Labyrinth Dysfunction: Often cause of vertigo. Imparment of the labyrinth on one side causes a short period of vertigo, disequilibrium, nystagmus, and some nauseaand vomiting.

4.Benign Positional Vertigo: The condition of benign vertigo, which is caused by changes in head position, is commonly seen in the elderly population.