Question

Crus cerebri is located in
A. Forebrain
B. Hindbrain
C. Midbrain
D. None of the above

Answer 1

Hint: The large crossed fibres called crus cerebri form the middle peduncle of the cerebellum. It acts as the bridge connecting the opposite half of the cerebellum to each cerebral hemisphere.

Complete Answer:
- The brain is our body's central information processing organ and acts as the "command and control system." It governs voluntary movements, body coordination, the working of essential internal organs, thermoregulation, hunger and thirst, various endocrine gland functions, and human behaviour. It is also a place where vision, sight, voice, memory, intellect, feelings and thoughts are processed. The brain is divided into three regions- forebrain, midbrain, and hindbrain.

- The forebrain comprises the hypothalamus, thalamus and cerebrum. The main portion of the human brain is the cerebrum. The forebrain plays a vital role in the retrieval of information connected to complex cognitive tasks, voluntary, and sensory and associative functions.

- The hindbrain comprises pons, cerebellum and medulla. Pons is made up of fibre tracts that link various regions of the brain. In order to supply several neurons with the extra space, the cerebellum has a rather convoluted top. The medulla of the brain is connected to the spinal cord.

- The midbrain lies between the thalamus/hypothalamus of the forebrain and the pons of the hindbrain. The midbrain is associated with control of motor function, particularly eye movements, and processing of auditory and visual information. Crus cerebri is made up of neurons that link the cerebral hemispheres to the cerebellum are also inside the midbrain.

Therefore, the correct answer is option C i.e., parietal cells.

Note: The brainstem is the region situated between the deep structures of the cerebral hemispheres and the cervical spinal cord at the base of the brain. The brainstem is made up of three main regions; the midbrain, pons and medulla oblongata. The connections between the brain and the spinal cord are created by the brain stem.