The thermoregulatory centre is located at?

Appeared in: KPSC Staff Nurse - 2015

Explanation

The hypothalamus is the primary thermoregulatory center of the brain, responsible for maintaining the body's core temperature.
It functions like a thermostat, receiving input from temperature receptors and initiating responses to either generate or dissipate heat.
The anterior hypothalamus controls heat loss mechanisms such as sweating and vasodilation.
The posterior hypothalamus controls heat production and conservation mechanisms like shivering and vasoconstriction.

Option A: The pituitary gland is the 'master gland' of the endocrine system, primarily involved in secreting hormones that control growth, metabolism, and reproduction. It does not regulate body temperature.
Option B: The pons is part of the brainstem that acts as a bridge, relaying signals between the cerebrum and cerebellum. It is involved in sleep, respiration, and other functions, but not thermoregulation.
Option C: The medulla oblongata, also part of the brainstem, contains the vital centers for controlling involuntary functions like heartbeat, breathing, and blood pressure.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy and Physiology of the Brain as background academic context rather than a clinical decision trigger.
A nurse must understand the role of the hypothalamus in fever (pyrexia). Infections can cause the release of pyrogens, which 'reset' the hypothalamic set point to a higher temperature, leading to fever.
Damage to the hypothalamus from trauma, tumors, or surgery can lead to severe problems with temperature regulation, causing either persistent hyperthermia or hypothermia. Nurses must monitor temperature closely in such patients.
What if? - If a patient has a lesion in the posterior hypothalamus, they would be unable to conserve heat effectively. They would not shiver or vasoconstrict in response to cold, making them highly susceptible to hypothermia.

How to Approach the Question

Identify the key term in the question: 'thermoregulatory centre'.
This is a factual recall question related to neuroanatomy and physiology.
Recall the primary functions of the major parts of the brain listed in the options.
Associate 'thermoregulation' or 'body's thermostat' with the hypothalamus.
Eliminate the other options based on their known primary functions: Pituitary (hormones), Pons (relay/respiration), and Medulla (vital functions like heart rate and breathing).

Concept Tested & Keywords

Qu38YmkQQFkt94lMZWfU7j

E6 Physiology Essentials Sembulingam 10e Part 2 p. 10-12

E6 Psychology Baron Misra 5e Part 1 p. 73-75

Practise the full KPSC Staff Nurse - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.