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CHAPTER 9: Diencephalon

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The thalamic sensory relay neurons include the:

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A. thalamic reticular nuclei.

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B. association nuclear group.

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C. pulvinar.

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D. lateral geniculate nucleus.

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D. lateral geniculate nucleus.

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Somatic sensory information from the contralateral body innervates third-order cells in the:

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A. ventroposterolateral nucleus (VPL) of the thalamus.

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B. ventroposteromedial nucleus (VPM) of the thalamus.

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C. medial geniculate nucleus of the thalamus.

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D. dorsomedial nucleus (DM) of the thalamus.

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A. ventroposterolateral nucleus (VPL) of the thalamus.

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Within the Papez circuit, a lesion of the anterior nuclear group will most likely produce loss of the following:

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A. Ability to control eye motions

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B. Emotion and factual memories

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C. Episodic memory and spatial orientation

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D. Motor control of gait and balance

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C. Episodic memory and spatial orientation

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Thalamic dorsomedial nucleus projections bypass the primary somatosensory cortex, with the following consequence:

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A. Pain processing is more precise and detailed than for VPL and VPM.

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B. Pain processing is less precise and detailed than for VPL and VPM.

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C. Pain processing incorporates the reticular formation for nonspecific arousal.

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D. Pain processing is centralized within the temporal association area.

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B. Pain processing is less precise and detailed than for VPL and VPM.

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These structures regulate water metabolism through secretion of vasopressin.

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A. Paraventricular and supraoptic hypothalamic nuclei

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B. Solitary and parabrachial nuclei

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C. Ventral anterior and ventral lateral nuclei

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D. Reticular and intralaminar nuclei

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A. Paraventricular and supraoptic hypothalamic nuclei

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Release of this by the arcuate nucleus stimulates mitosis and is important in adults for tissue maintenance and metabolism.

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A. Somatostatin

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B. Growth hormone–releasing hormone

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C. Oxytocin

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