Concept explainers
Watch this video (http://openstaxcollege.org/l/basalnuclei2) to learn about the basal nuclei (also known as the basal ganglia), which have two pathways that process information within the cerebrum. As shown in this video, the indirect pathway is the longer pathway through the system that results in decreased activity in the cerebral cortex, and therefore less motor activity. The indirect pathway has an extra couple of connections in it, including disinhibition of the subthalamic nucleus. What is the end result on the thalamus, and therefore on movement initiated by the cerebral cortex?
Want to see the full answer?
Check out a sample textbook solutionChapter 13 Solutions
Anatomy & Physiology
Additional Science Textbook Solutions
College Physics
Campbell Biology in Focus (2nd Edition)
Anatomy & Physiology
Campbell Essential Biology (6th Edition) - standalone book
Fundamentals of Anatomy & Physiology (11th Edition)
Human Biology: Concepts and Current Issues
- Julio D., who had recently retired, was enjoying an afternoon of playing golf when suddenly he experienced a severe headache and dizziness. These symptoms were quickly followed by numbness and partial paralysis on the tipper right side of his body, accompanied by an inability to speak. After being rushed to the emergency room, Julio was diagnosed as having suffered a stroke. Given the observed neurological impairment, what areas of his brain were affected?arrow_forwardWatch this video (http://openstaxcollege.org/l/neuroexam) that provides a demonstration of the neurological exam—a series of tests that can be performed rapidly when a patient is initially brought into an emergency department. The exam can be repeated on a regular basis to keep a record of how and if neurological function changes over time. In what order were the sections of the neurological exam tested in this video, and which section seemed to be left out?arrow_forwardWatch this video (http://openstaxcollege.org/l/basalnuclei1) to learn about the basal nuclei (also known as the basal ganglia), which have two pathways that process information within the cerebrum. As shown in this video, the direct pathway is the shorter pathway through the system that results in increased activity in the cerebral cortex and increased motor activity. The direct pathway is described as resulting in disinhibition of the thalamus. What does disinhibition mean? What are the two neurons doing individually to cause this?arrow_forward
- Watch the video (http://openstaxcollege.org/l/2brains) titled The Man With Two Brains to see the neuroscientist Michael Gazzaniga introduce a patient he has worked with for years who has had his corpus callosum cut, separating his two cerebral hemispheres. A few tests are run to demonstrate how this manifests in tests of cerebral function. Unlike normal people, this patient can perform two independent tasks at the same time because the lines of communication between the right and left sides of his brain have been removed. Whereas a person with an intact corpus callosum cannot overcome the dominance of one hemisphere over the other, this patient can. If the left cerebral hemisphere is dominant in the majority of people, why would right-handedness be most common?arrow_forwardHow does neuronal loss in different parts of the basal ganglia lead to the symptoms seen in Parkinson's and Huntington's disease? Be sure to describe the symptoms and the core basal ganglia circuit!arrow_forwardThe striations seen within the different structures of the basal ganglia are due to the presence of what neuronal structure?arrow_forward
- Limbic System, Emotion, Reward, and Addiction List the effects of amygdala lesions at the introduction level (Introduction to Neuroscience College Level). This is not a question about the Papez circuit. It's a question about the effects of amygdala lesions.arrow_forwardNarcolepsy is thought to occur from dysfunction of neurons located in the hypothalamus hippocampus thalamus amygdalaarrow_forwardThe medulla oblongata is one of the smallest sections of the brain. Why can damage to it cause death, when similar damage in the cerebrum might go unnoticed?arrow_forward
- You are walking to class, pondering the intricacies of physiology, when you trip over an uneven place in the sidewalk and fall. Unhurt but embarrassed and angry, you jump up and glance around to see if anyone is watching. From your knowledge of neuroanatomy and function, explain how the following areas of the brain might be involved in this scenario: cerebrum cerebellum limbic systemarrow_forwardIn the basal ganglia, which of the following occurs? disinhibition results in the inhibition of glutamate onto the thalamus the release of GABA onto the internal segment of the globus pallidus is excitatory In the indirect pathway, disinhibition blocks glutamate release from the subthalamic nucleus In the direct pathway, disinhibition blocks GABA release onto the thalamusarrow_forwardFunctions of basal ganglia include all the following, except :-a- planning and programming of voluntary movementsb- initiation of reflex movement.c- postural regulationd- executing learned pattern of movement.arrow_forward
- Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax CollegeBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning