The central nervous system Flashcards
Cerebral hemispheres
The cerebral hemispheres are two almost symmetrical brain structures that appear to be separated by a deep groove (longitudinal fissure). However several strands of nerve tissue connect the two hemispheres
Functions of the brain
Regulates normal functions of your bodily processes and influences your growth, mood, and responses to stress
Origin of emotions
Responsible to planning, thinking, and learning
Left hemisphere
VERBAL
Receives sensory information, from the right side of the body and controls movements of the right side of the body
- reading, writing, speaking.
Analytical functions
Breaking down tasks to key parts and approach in a sequential way
Right hemisphere
NON VERBAL
Receives sensory information from the left side of the body and controls movement in the left side
- spacial and visual thinking
Completing jigsaw puzzles, reading a map, recognising faces
Corpus Callosum
A band of nerve tissue connecting left/right hemispheres and serving as the main communication pathway (but there is others) it is the bridge for neural messages
Frontal lobe
Largest lobe Occupies the upper forward half of each cerebral hemisphere - personality - control of emotions - attention - voultary bodily movements
Broca’s area (left frontal lobe)
Critical role in production of speech
- in particular, coordinating movement of the muscles required for speech
Primary Motor Cortex
Specifically involved in controlling voluntarily bodily movements though it’s control of the skeletal muscles
More complex or “fine” movements equal to more cortex taken up
Parietal lobe
In each hemisphere receives and processes sensory information from the body and skin senses (called senatosensory information)
- attention and spacial reading
The primary somatosensory cortex
Receives and processes sensory information from the skin and body. Located in the parietal lobe
Temporal lobe
In each hemisphere is primarily involved with auditory perception
Also plays an important role in memory
Each lobe contains a hippocampus.
- recognise faces
- emotional response to sensory information and memories
Temporal lobe
3 Memories
1) Facts
2) How to do things (procedural memories)
3) Personal experiences (episodic memories)
Primary auditory cortex
Each temple receives and process sounds from each ear
2 main features of sound frequency (pitch)
And amplitude (loudness)
Wernicks area
Left temporal lobe next to the primary cortex. Connected to Broca’s area with a bundle of nerves. Responsible for speech production, comprehension of speech, interprets sounds and human speech and verbal sounds.
• Verbal sounds are processes in the left hemisphere
• Non verbal sounds (music) process in the right hemisphere
Occipital lobe
Responsible for the sense of vision, reasons of why our memories have images. Connects visual cortex, connecting information.
Occipital lobe interacts with other lobes
