Question

Pallium is
A. Thick walled
B. Thin walled
C. Non-nervous
D. None of the above

Answer 1

Hint:
The brain of the living organism is a complex structure both in its structure and functionality. It consists of numerous cells and processes the sensory information and directs the motor responses. During development, in living organisms the brain can be divided into forebrain or the prosencephalon, midbrain or the mesencephalon and the hindbrain or the rhombencephalon. In due course, each part of the brain gives rise to different important parts such as the cerebrum, cerebellum and the brain stem.

Complete answer:
The brain is one of the largest and most important parts of the body. It performs several complex functions such as processing of information, nervous and motor responses etc. The brain is divided into three important parts which are the cerebrum, the cerebellum and the brain stem. The brain stem acts as the connection between the spinal cord and the brain and is the distal part of the brain. It is made of the pons, medulla oblongata and the midbrain. The cerebellum is the prime structure of the hindbrain and is located near to the brain stem. The cerebellum is situated near the cerebrum. The cerebrum is the uppermost portion of the brain and consists of the major lobes. It is also known as the telencephalon. It consists of the cerebral cortex and other areas such as basal ganglion, hippocampus and olfactory lobes.
The cerebrum develops from the prosencephalon. The dorsal telencephalon in mammals develops into the cerebral cortex. The dorsal telencephalon is also known as the pallium. The pallium is the region of the telencephalon. In mammals, the pallium is made up of grey matter and is thick walled structure. It is divided into four parts which are medial, dorsal, lateral and basal. The medial part of the pallium forms the hippocampus and the cortex is made up of dorsal pallium. The lateral and ventral pallium forms the olfactory cortex, bulbs and the pallial part of the amygdala.
The most important commissure of the pallium is known as the corpus callosum. The pallium performs various diverse tasks and functions. Most of the different functions of the pallium are associated with cognitive functions such as learning, emotions, intelligence and memory. It is also responsible for conscious movements.

Therefore, the correct option is option A.

Note: The dorsal telencephalon forms the cerebral cortex and the ventral telencephalon forms the basal ganglia. The dorsal telencephalon is called the pallium and the ventral telencephalon is known as the sub-pallium. The pallium is thick walled and is associated with higher levels of thinking and intelligence in humans.