QuestionSBA
QuestionChoice
Incorrect - The subthalamic nucleus is part of the subthalamic nucleus. It is implicated in the pathogenesis of hemiballismus, or involuntary movements. This is a form of gross motor dysfunction, as opposed to the fine motor disturbance in essential tremors.
10008353
d
Subthalamic Nucleus
QuestionChoice
Incorrect - The supraoptic nucleus is part of the hypothalamus. It regulates blood pressure through the secretion of ADH, and social bonding behaviours through oxytocin release. It is not implicated in tremors.
10008354
e
Supraoptic Nucleus
QuestionChoice
Incorrect - The nucleus solitarius receives special sensory information via visceral afferent fibres from cranial nerves VII, IX, and X. It is not responsible for the production of tremors.
10008352
c
Nucleus Solitarius
QuestionChoice
Incorrect - The nucleus ambiguus is involved in the motor supply to the branchiomotor muscles of the pharynx, palate, and larynx and parasympathetic supply to the cardiac muscle. It provides a motor nucleus for cranial nerves IX, X, and XI. It is not responsible for the production of tremors.
10008351
b
Nucleus Ambiguus
QuestionChoice
Correct - The globus pallidus is part of the basal ganglia, a key brain region involved in motor selection and control. Disruptions to neural activation within the globus pallidus will result in decreased thalamic inhibition and hence greater excitation of the motor cortex. This produces tremors.
10008350
a
Globus Pallidus
Concept
Chapter
2693
4663
Essential Tremor
Topic
141
Neurology
14217
A 37-year-old woman attends the GP surgery to discuss an essential tremor that involves her right hand. It has been present for the past five years, and makes it difficult to perform fine motor activities such as drawing and sewing.

Which nucleus within the brain is associated with the generation of tremors?
a