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The axons of the ganglion cells exit the eye balls and ascend to reach the __ in the thalamus
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- Watch this video (http://openstaxcollege.org/l/motorpathway) to learn more about the descending motor pathway for the somatic nervous system. The autonomic connections are mentioned, which are covered in another chapter. From this brief video, only some of the descending motor pathway of the somatic nervous system is described. Which division of the pathway is described and which division is left out?Watch 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?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?
- Parkinson's Disease results in a(n) (increase or decrease) in D1 mediated effects on striatal medium spiny neurons. This results in excess (inhibition or excitation) of the thalamus and cortex.Third order neurons always have their cell bodies in the thalamus. True FalseA neuron stimulating the biceps brachii (muscle at the arm) to contract belongs to___ visceral motor division visceral sensory division somatic motor division somatic sensory division
- Axons in the optic nerve from the right eyea. all go to the right occipital lobe.b. all go to the left occipital lobe.c. all go to the thalamus.d. go mostly to the thalamus, but some go to the superior colliculus.e. go partly to the right occipital lobe and partly to the left occipital lobeThe___division of the nervous system carries nerve impulses to glands; cardiac muscles (heart) ; and smooth muscle in organs. somatic sensory (afferent) visceral sensory (afferent) somatic motor visceral motor (autonomic)A defective cerebral aqueduct would result from the impaired development of the________. metencephalon telencephalon diencephalon myelencephalon mesencephalon
- The___is the area of the thalamus that deals with somatosensory information A.Lateral genicualte nucleus(LGN) BVentral anterrior.Ventral lateral(VA/L) C.Ventral posterior nucleus(VPN) D.Medial geniculate nucleus(MGN)Alpha receptors in the autonomic nervous system make the____ muscle_____.This organ is considered a sympathetic ganglion
