Basal Ganglia and Retina Quiz
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Questions and Answers

Which condition is characterized by left nasal hemianopsia and loss of the left temporal retina?

  • Partial lesion of the left optic nerve (correct)
  • Tumor in the right optic nerve
  • Arterial dysfunction in the left optic nerve
  • Lesion in the optic chiasm
  • What type of visual field defect is associated with lesions in the entire visual tract?

  • Right upper quadrant anopsia
  • Bitemporal hemianopsia
  • Left homonymous hemianopsia (correct)
  • Left upper temporal quadrantanopsia
  • What causes right nasal hemianopsia and left temporal hemianopsia?

  • Aneurysmal compression by internal carotid artery
  • Pituitary tumor
  • Tumor of the temporal lobe
  • Lesion in the lateral portion of the right optic nerve (correct)
  • Which structure is NOT part of the Basal Ganglia major structures?

    <p>Thalamus</p> Signup and view all the answers

    What type of visual field defect is associated with lesions in the lower optic radiations?

    <p>Left homonymous inferior quadrant anopsia</p> Signup and view all the answers

    What causes blindness of the right nasal visual field?

    <p>Lesion at the level of Optic Nerve Chiasma</p> Signup and view all the answers

    What is the primary function of the subthalamus?

    <p>Controlling voluntary movements</p> Signup and view all the answers

    Which layer of the retina contains the photoreceptor cells?

    <p>Photoreceptors</p> Signup and view all the answers

    What is the primary cause of retinal detachment?

    <p>Separation of neural retina from the pigment epithelium</p> Signup and view all the answers

    Which neural circuitry is responsible for the pupillary light reflex?

    <p>Parasympathetic fibers from Edinger-Westphal nucleus</p> Signup and view all the answers

    What is the primary function of rods in the retina?

    <p>Low light vision</p> Signup and view all the answers

    Which structural member of the basal ganglia is responsible for contralateral hemiballism when lesioned?

    <p>Subthalamic nucleus</p> Signup and view all the answers

    What is the primary effect of the direct pathway in the Basal Ganglia?

    <p>Stimulates the thalamus</p> Signup and view all the answers

    Which structure is mainly affected in Huntington's Disease associated with the direct pathway?

    <p>Thalamus</p> Signup and view all the answers

    What happens to the motor cortex in Huntington's Disease related to the indirect pathway?

    <p>It is stimulated</p> Signup and view all the answers

    Which symptom is characteristic of Parkinson's Disease?

    <p>Rigidity</p> Signup and view all the answers

    Which region is part of the output from Basal Ganglia to reduce muscle tone?

    <p>Reticular Formation</p> Signup and view all the answers

    In Parkinson's Disease, what happens to the direct pathway in terms of excitement?

    <p>It is inhibited</p> Signup and view all the answers

    What is the primary function of the Medial Geniculate Body (MGB) in the thalamus?

    <p>Processes auditory stimuli</p> Signup and view all the answers

    Which thalamic nucleus plays a role in orientation toward visual, auditory, and other sensory stimuli?

    <p>Pulvinar</p> Signup and view all the answers

    Which hypothalamic nucleus is primarily responsible for the regulation of recollective memory?

    <p>Mammillary Bodies</p> Signup and view all the answers

    What is the primary role of the Lateral Geniculate Body (LGB) in the thalamus?

    <p>Processes visual stimuli</p> Signup and view all the answers

    Which region of the brain is responsible for relaying information between regions of the brain and controlling many autonomic functions in the peripheral nervous system (PNS)?

    <p>Subthalamus</p> Signup and view all the answers

    What is the primary function of the habenular nuclei in the epithalamus?

    <p>Integration of neurological functions and implicated in addiction</p> Signup and view all the answers

    Which part of the basal ganglia is responsible for the initiation and inhibition of gross intentional body movements?

    <p>Corpus striatum</p> Signup and view all the answers

    Which structure is part of the indirect pathway of the basal ganglia-thalamocortical circuit and sends efferent connections to the subthalamic nucleus?

    <p>External segment of the globus pallidus (GPe)</p> Signup and view all the answers

    Which neurotransmitter is released by the neurons of the substantia nigra pars compacta (SNpc) that project to the striatum?

    <p>Dopamine</p> Signup and view all the answers

    Which layer of the retina contains the photoreceptors responsible for converting light into electrical signals?

    <p>Outer nuclear layer</p> Signup and view all the answers

    Which part of the basal ganglia is primarily involved in the regulation of muscle tone and the performance of exact movements?

    <p>Corpus striatum</p> Signup and view all the answers

    Which structure of the basal ganglia sends efferent connections to the thalamus?

    <p>Internal segment of the globus pallidus (GPi)</p> Signup and view all the answers

    Which structure serves as a cell station to all main sensory systems?

    <p>Thalamus</p> Signup and view all the answers

    Which component of the diencephalon is described as a large egg-shaped mass of gray matter?

    <p>Thalamus</p> Signup and view all the answers

    Which part of the diencephalon is NOT visible from the surface of the brain?

    <p>Cerebral aqueduct</p> Signup and view all the answers

    What is the boundary of the diencephalon component that is bordered bilaterally by the thalamus and hypothalamus?

    <p>3rd ventricle</p> Signup and view all the answers

    Which structure forms a major part of the diencephalon?

    <p>Thalamus</p> Signup and view all the answers

    What is the primary role of the thalamus in brain function?

    <p>Cell station to all main sensory systems</p> Signup and view all the answers

    Which structure borders the 3rd ventricle cavity bilaterally with the hypothalamus?

    <p>Thalamus</p> Signup and view all the answers

    In terms of anatomy, which structure is superior to the Septum pellucidum and Fornix?

    <p>Caudate nucleus</p> Signup and view all the answers

    Which component of the diencephalon is situated on each side of the 3rd ventricle?

    <p>Thalamus</p> Signup and view all the answers

    What is the primary function of the caudate nucleus in the brain?

    <p>Motor control in voluntary movements</p> Signup and view all the answers

    Which artery supplies blood to the medial frontal and parietal lobes?

    <p>Anterior cerebral artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the midbrain and thalamus?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the posterior limb of internal capsule?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the choroid plexus?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery supplies blood to the splenium of corpus callosum?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the superior cerebellar artery?

    <p>Basilar artery</p> Signup and view all the answers

    Which artery supplies blood to the posterior inferior cerebellar artery?

    <p>Vertebral artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the midbrain?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery supplies blood to the anterior limb of internal capsule?

    <p>Anterior cerebral artery</p> Signup and view all the answers

    Which artery supplies blood to the optic tract?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery supplies the anterior cerebral artery and acts as an anastomotic connecting vessel in the Circle of Willis?

    <p>Posterior communicating artery</p> Signup and view all the answers

    Which artery supplies the posterior inferior cerebellar artery and the cerebellum?

    <p>Vertebral artery</p> Signup and view all the answers

    Which artery supplies the falx cerebelli, a sheet of dura mater?

    <p>Meningeal branch</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the structures of the orbit?

    <p>Ophthalmic artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the pons and the cerebellum?

    <p>Basilar artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the anterior cerebrum?

    <p>Anterior cerebral artery</p> Signup and view all the answers

    Which artery supplies blood to the posterior cerebrum?

    <p>Posterior cerebral artery</p> Signup and view all the answers

    Which artery supplies blood to the anterior spinal cord?

    <p>Anterior spinal artery</p> Signup and view all the answers

    Which artery supplies blood to the posterior spinal cord?

    <p>Posterior spinal artery</p> Signup and view all the answers

    Which artery is responsible for supplying blood to the subthalamic nucleus?

    <p>Middle cerebral artery</p> Signup and view all the answers

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