Hindbrain, Midbrain And Forebrain Flashcards
What are the three parts of the brain?
The hindbrain, the midbrain, the forebrain.
These structures interact and work together to enable our body to behave and function in accordance with our thoughts and feelings.
What is the hindbrain?
It’s the lower brai which mainly supports bodily functions and it’s linked between the spinal cord and the brain. It’s important for movement and balance. It includes the brain stem, medulla, pons, cerebellum and part of the reticular formation.
The medulla:
First major component of the hindbrain. It’s a continuation of the spinal cord and has an important role in controlling breathing, heartbeat and digestion.
The pons:
Sits above the medulla and receives info sent from the visual areas to control eye and body actions. it controls movement, breathing, sleeping, dreams and waking.
The cerebellum:
A walnut-shaped area that receives info from the pons. It’s roles is to coordinate the sequence of body movement. Controls perception and cognition, balance and fine muscle control.
The brainstem:
It’s par of the brain that connects the brain to the spinal cord. Its role is to regulate reflex survival responses.
What is the midbrain?
Sits above the hindbrain and below forebrain. It’s responsible for the regulation of sleep, motor movement and arousal. It includes part of the reticular formation.
What is the reticular formation?
A network of neurons that’s part of both the midbrain and hindbrain, as well as connecting the hindbrain and forebrain.
The reticular formation is important in controlling arousal and in the ‘sleeping and waking’ cycle.
What is the forebrain?
The upper level structures of the brain, which includes a number of important brain structures including the cerebrum, the hypothalamus and the thalamus.
The cerebrum:
Is the biggest and most recognisable par of the forebrain. It’s covered by a thin layer known as the cerebral cortex, and divided into the left and right cerebral hemispheres. These are separated by the longitudinal fissure-a deep groove that runs from the front to the rear of the cortex.
What joins the two hemispheres?
The corpus callosum, connects the left and right hemispheres of cerebral cortex. The corpus callosum consists of a set of neural fibres that bridge the gap between the two. Each hemisphere has a central fissure that runs from the top of each hemisphere and down the sides, spreading the front (anterior) of the cerebral cortex from the rear (posterior)
The hypothalamus:
A small structure that has a very important role in the control of basic survival actions: sleep, regulation of body temperature, expression of emotions and the four f’s - feeding, fighting, fleeing and fornication
What is the cerebral cortex?
The outer layer of brain- higher mental processes and complex behaviours
The thalamus:
Located beneath the cerebral cortex, deep within the cerebral hemispheres. It’s divided into two egg-shaped parts that sit side by side, with one part located in each hemisphere.
The thalamus is the communication centre of the brain and it receives info from the ears, eyes, skin and other sensory organs. It’s important role is to regulate the overall activity in the cortex.
What is the thalamus two important roles?
- enables an organism to process sensory stimuli in the environment.
- to determine which of the incoming sensory information is the most important for us to pay attention to.
The Spinal cord:
A bundle of nerve fibres connecting the brain with the peripheral nervous system. It’s role is to relay info between the brain and body; some simple reflexes.
What is the role of the cerebral cortex?
It’s responsible for receiving information from the environment, for controlling our responses and for higher order thinking processes including problem solving and planning. It’s important in memory, language and regulation of emotions.
What does the cerebral cortex allow us to do?
Allows us to undertake a range of tasks and to detect differences between pieces of info, to understand the meaning of this info and to think in abstract and symbolic was enabling creativity in art, writing, debating and use of metaphor.
What is the structure of the cerebral cortex?
The Cortex is very thin (3mm) and contains billions of neurons. It’s convolutions (folds, grooves and bulges) make the surface area of the cortex large enough to contain enormous amounts of neurons and blood vessels that can supply energy.
What is gyri?
The bulges found on the cerebral cortex, (singular gurus)
What is sulci?
The valleys on the cerebral cortex (singular, sulcus)