BearCh14-ACRQedt - Chapter 14 Brain Control of Movement...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 14 – Brain Control of Movement Answers to Chapter Review Questions Page 1 of 3 Copyright © 2007. Lippincott Williams & Wilkins. Ancillary material to accompany Bear et al.: Neuroscience: Exploring the Brain, 3e Question 1: List the components of the lateral and ventromedial descending spinal pathways. Which type of movement does each path control? Answer: The components of the lateral descending spinal pathways are the corticospinal tract and the rubrospinal tract. The components of the ventromedial descending spinal pathways are the vestibulospinal tract, the tectospinal tract, the pontine reticulospinal tract, and the medullary reticulospinal tract. The lateral pathways are involved in the voluntary movement of the distal musculature. The lateral pathways control the fine movements of arms and fingers. The ventromedial pathways control the posture of the head and neck. Question 2: You are a neurologist presented with a patient who has the following symptom: an inability to independently wiggle the toes on the left foot, but with all other movements (walking, independent finger movement) apparently intact. You suspect a lesion in the spinal cord. Where? Answer: Lesions in the descending motor tracts, which originate in the upper motor system, can cause an abnormal Babinski sign. This was described by French neurologist Joseph Babinski in 1896. Scratching the sole of the foot from the heel toward the toes causes reflexive upward flexion
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/09/2009 for the course SPHSC 449 taught by Professor Peter during the Summer '09 term at University of Washington.

Page1 / 3

BearCh14-ACRQedt - Chapter 14 Brain Control of Movement...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online