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Wednesday, January 23, 2008

NC227L Chapt.10

NC227L Chapt.10

作業八:Chapter 10 Vestibular System 前庭系統

(Learning Objectives整理)


負責人:9580039 陳穎萱

Discuss the importance of the vestibular system in equilibrium.


【內容】NC233 ~ NC234Figure 10-6(page 233)Figure 10-7(page 235)


負責人:9580040 黃宜樺

Describe the anatomy of the vestibular system


【內容】大概在課本的NC227 ~ NC229




負責人:9580042 黃宏舜

Describe the projections of the vestibular complex


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

vestibular complex = vestibular system


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.



負責人:9580043 韓佳吟

Describe the mechanism of nystagmus


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


負責人:9580045 張雅雯

Describe the mechanism of nystagmus.


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


負責人:9580046 陳俊廷

Discuss the vestibular mechanism that controls rotational and ocular movements


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

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

【內容】P.232-235Figure 10-610-7


負責人:9580047 王思婷

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


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



負責人:9580048 許舒琇

Discuss common vestibular dysfunctions



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.

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