Brain Structure And Functions | Class 12 Biology

Hi Everyone! Welcome To My Channel "Ali Academy Biology Lectures"
About This Video ........................
In This Video Lecture You Will Learn Basic Concept Of Brain
The brain can be divided into forebrain, midbrain and hindbrain. Forebrain is further divided
n the amygdala, clusters of neurons produce sensation of pleasure, punishment or sexual arousal
its hormone production and neural connections acts as a major co-ordinating centre controlling
carries sensory information to the limbic system and cerebrum. The information includes sensory
The limbic system is located in an arc between the thalamus and cerebrum. Limbic system works
fear, rage, tranquillity, hunger, thirst, pleasure and sexual responses. Portion of limbic system is
amygdala, and hippocampus, as well as nearby regions of cerebrum. The hypothalamus through
input from auditory and visual pathways, from the skin and from within the body.
body temperature, hunger, the menstrual cycle, water balance, the sleep-wake cycle etc.
together to produce our most basic and primitive emotions, drives, and behaviours, including
into three functional parts, the thalamus, the limbic system and the cerebrum. Thalamus
also important in the formation of memories. The limbic system consists of hypothalamus, the
when stimulated. It is also involved in the feelings of fear and rage.
Hippocampus plays an important role in the formation of long term memory, and thus is required
for learning. Cerebrum is the largest part of the brain and is divided into two halves, called cerebral
hemispheres. These halves communicate with each other by means of a large band of axons, called
corpus callosum.
Tens of billions of neurons are packed into this part. The outer region, the cerebral cortex, forms
centre for sending impulses to voluntary muscles, controlling movements. This is also involved in
The left cerebral hemisphere controls the right side of the body, and right cerebral hemisphere
in the learning and memory storage for behaviours. It is best developed in bird , which is engaged
guides, smooth and accurate motions and maintains body position. The cerebellum is also involved
intelligence, reasoning and judgement.
such as eyes and ears are received and converted into subjective impressions, such as light and
important in screening the input information, before they reach higher brain centres. Hindbrain
breathing, Heart rate, blood pressure and swallowing. Certain neurons in pons, located above the
medulla, appear to inluence transitions between sleep and wakefulness, and the rate and pattern
folds called convolutions, which greatly increase its surface area. This part receives sensory
controls the left side of the body. Midbrain is reduced in humans, and it contains auditory relay
and is responsible for the poorly understood process that we call thinking.
sound. Nearby association areas interpret this information. This area is also involved in speech
centre and centre that controls relex movements of eyes. Midbrain contains reticular formation,
of breathing. The cerebellum is important in co-ordinating movements of the body. The cerebellum
and also receives and interprets sensations of touch from all parts of the body. This area is also a
information, processes it, stores some in memory for future use, directs voluntary movements,
which is a relay centre connecting hindbrain with the forebrain. Reticular formation is very
includes the medulla, pons and cerebellum. Medulla controls several automatic functions, such as
The cerebral cortex contains primary sensory areas where signals originating in sensory organs
in the complex activity of light.
About This Channel.....................
I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources.
One-stop destination for all biology lectures.
_ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial
_ The videos are categories under various heading to make the students life simplified
Visit My Other Channel Playlist .....................
NMDCAT PART 1: • New 1st Year Biology
NMDCAT PART 2: • New 2nd Year Biology
Class 11th Lectures: • New 1st Year Biology
Class 12th Lectures: • New 2nd Year Biology
Class 10th Lectures:
• Matric Biology
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