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Vestibular System and Motor Control Prof. Mahmoud Samir Mohamed

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Questions and Answers

What is the main function of the semicircular canals in the vestibular system?

To act as angular accelerometers (correct)
To provide information about body position relative to gravity
To detect linear acceleration or movement of the head in a straight line
To stabilize the eyes during head movements

Which of the following is not a component of the peripheral vestibular system?

The semicircular canals
The eighth cranial nerve
The vestibular nuclei (correct)
The sensory receptors

What is the primary role of the vestibular system in motor control?

To provide proprioceptive feedback for muscle control
To stabilize the eyes and maintain postural stability (correct)
To coordinate complex voluntary movements
To integrate sensory information for balance and spatial orientation

Which of the following vestibular receptors provides information about linear acceleration or movement of the head in a straight line?

The saccule (C) Signup and view all the answers

How do abnormalities in the vestibular system typically manifest?

Sensations of dizziness, unsteadiness, and problems with visual focus and balance (A) Signup and view all the answers

What is the primary function of the vestibular system's static and dynamic components?

To provide information about head position and movement (A) Signup and view all the answers

What is the main function controlled by the semicircular canals?

Sensing head rotation and angular accelerations (C) Signup and view all the answers

Which part of the vestibular system detects linear acceleration, in addition to its static functions?

Utricle (A) Signup and view all the answers

Where do a certain portion of the vestibular sensory receptors directly go to, apart from the cerebellum?

Thalamus (D) Signup and view all the answers

Which nucleus receives input from the utricle, semicircular canals, cerebellum, and spinal cord?

Lateral Vestibular Nucleus (A) Signup and view all the answers

Which nucleus has outputs to the medial vestibulospinal tract with connections to the cervical spinal cord?

Medial Vestibular Nucleus (D) Signup and view all the answers

Which part of the vestibular system plays an important role in coordinating interactions between head and eye movements?