Inside the Human Brain

HSP3M

Inside the Teenage Brain Adolescence is characterized by

extreme mood swings and participation in risk-taking behaviour.

Many changes are occurring in the frontal cortex which account for these behaviours.

The frontal cortex, which is responsible for reason and logic, is not fully developed in adolescents.

Inside the Teenage Brain Due to this, many adolescents

misinterpret emotions causing conflict with parents, peers and teachers.

Example: Misinterpreting one’s behaviour as anger.

The adolescent brain does not interpret environmental information in the same manner as adult do.

Inside the Teenage Brain The cerebellum, responsible for

organizing thoughts and cognition, changes the most during adolescence.

The cerebellum is not fully developed until a person is 21 years old.

This lack of development can account for adolescents not always hearing or understanding what their parents or teachers are trying to communicate and their lack of organization.

Inside the Teenage Brain Getting adequate sleep is one of the

best things adolescents can do to enhance learning and brain development.

Adolescents need 9 ¼ hours sleep a night to function properly.

Despite this, on average adolescents get only 7 ½ hours sleep per night.

This continuous sleep deficit causes significant gaps in learning.

Inside the Teenage Brain Adolescents circadian clock keeps teens up

late at night, however as school starts early they are forced to get up before they have received enough sleep.

As a result most adolescents are not able function properly in school as they are still in a sleep like state.

Studies show that when teens get adequate sleep they perform better on cognitive tasks.

Teens that are sleep deficient show significant gaps in their ability to retain information and perform cognitive tasks.

Inside the Teenage Brain So why does school start so early? Later school start studies indicate that

when school starts later (10 am- 4:30 pm), teens perform better academically and they are less frequently absent.

However they are less likely to participate in extra curricular activities which are also beneficial to healthy development.

The Human Brain--Functions

Human Brain The brain is made of three main parts: the

forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum,

thalamus, and hypothalamus (part of the limbic system).

The midbrain consists of the tectum and tegmentum.

The hindbrain is made of the cerebellum, pons and medulla.

Often the midbrain, pons, and medulla are referred to together as the brainstem.

Human Brain The cerebrum or cortex is the largest

part of the human brain, associated with higher brain function such as thought and action.

The cerebral cortex is divided into four sections, called "lobes": the frontal lobe, parietal lobe, occipital lobe, and temporal lobe.

Human BrainRight Hemisphere The right

hemisphere controls the left side of the body

Temporal and spatial relationships

Analyzing nonverbal information

Communicating emotion

Left Hemisphere The left

hemisphere controls the right side of the body

Produce and understand language

Human Brain Frontal Lobe- associated with

reasoning, planning, parts of speech, movement, emotions, and problem solving

Parietal Lobe- associated with movement, orientation, recognition, perception of stimuli

Occipital Lobe- associated with visual processing

Temporal Lobe- associated with perception and recognition of auditory stimuli, memory, and speech

Human Brain

The cerebellum, or "little brain", is similar to the cerebrum in that it has two hemispheres and has a highly folded surface or cortex.

This structure is associated with regulation and coordination of movement, posture, and balance.

The Human Brain Thalamus is a large mass of gray

matter deeply situated in the forebrain at the topmost portion of the diencephalon.

The structure has sensory and motor functions.

Almost all sensory information enters this structure where neurons send that information to the overlying cortex.

The Human Brain Hypothalamus- The structure is

involved in functions including homeostasis, emotion, thirst, hunger, circadian rhythms, and control of the autonomic nervous system.

Examples: Moods and motivation Sexual maturation Temperature regulation Hormonal body processes

The Human Brain

Amygdala- involved in memory, emotion, and fear.

The amygdala is both large and just beneath the surface of the front, medial part of the temporal lobe.

Human Brain

Hippocampus- This part of the brain is important for learning and memory. Specifically for converting short term memory to more permanent memory, and for recalling spatial relationships in the world about us.

Human Brain Pons- It is involved in motor control and

sensory analysis... for example, information from the ear first enters the brain in the pons.

It has parts that are important for the level of consciousness and for sleep.

Some structures within the pons are linked to the cerebellum, thus are involved in movement and posture.

Human Brain

Medulla- this structure is the caudal-most part of the brain stem, between the pons and spinal cord.

It is responsible for maintaining vital body functions, such as breathing and heart rate.