Unit VI Flashcards
___ is a rare neurological disease that affects motor neurons
Amyotrophic lateral sclerosis (ALS)
also known as Lou Gehrig’s Disease
Amyotrophic lateral sclerosis (ALS)
What does ALS Mean?
Amyotrophic lateral sclerosis
What’s another name for ALS?
Lou Gehrig’s Disease
Functions of the Nervous System
Sensory function
Integrative function
Motor function
Nervous system uses its millions of ___ to monitor changes occurring both inside and outside of the body
sensory receptors
The nervous system is unique among all other systems because within it, lies the ability of the human being to ___
know oneself
the unique ability of the human being to know oneself
consciousness or intelligence
Types of Sensory Receptors
Carbon Dioxide Chemoreceptors
Thermoreceptors
Mechanoreceptors
Photoreceptors
Carbon dioxide receptors process
Changes in the levels of oxygen and carbon dioxide concentrations ->
Medulla oblongata detects these changes and transmit messages ->
Brain signals the muscles in the heart, the lungs and diaphragm to increase or decrease the breathing.
detects these changes in the levels of oxygen and carbon dioxide concentrations
Medulla oblongata
To control the body temperature
Thermoreceptors
2 places for thermoreceptors
hypothalamus
skin
Sense organ that responds to mechanical stimuli such as touch or sound
Mechanoreceptors
Types of mechanoreceptors
Merkel’s disk
Meissner’s corpuscle
Kraus end bulb
Pacinian corpuscle
Ruffini ending
these are also known as tactile corpuscles
Meissner’s corpuscles
these mechanoreceptors are found in the skin on
the fingertips and eyelids
Meissner’s corpuscles
these are found in the vestibular area of the inner ear, where they contribute to the auditory system and equilibrioception
Hair cells
means “sense of balance”
equilibrioception
are receptors that are sensitive to light and can convert light signals into information to create a visual representation
Photoreceptors
these allow us to see an enormous range of light: from starlight to full sunshine, and all the colors of the rainbow
Photoreceptor
the term used to describe when nervous system process & interprets the sensory input and makes about what should be done at each moment
integration
the term used when the nervous system sends information to muscles, glands, and organs (effectors) so they can respond correctly, such as muscular contraction or glandular secretions
Motor function
The Nervous system is divided into:
Central Nervous System and Peripheral Nervous System
The central nervous system is composed of:
brain
spinal cord
The peripheral nervous system is composed of:
motor neurons and sensory neurons
The motor neurons are composed of the:
Somatic Nervous System
Autonomic Nervous System
The autonomic nervous system is composed of:
Sympathetic division
Parasympathetic division
this organ receives and processes sensory information, initiates responses, stores memories, generates thoughts and emotions
Brain
this conducts signals to and from the brain, it also controls reflex activities
Spinal cord
carries orders from the CNS to the muscles and glands
motor neurons
carries orders from the sensory organs to the CNS
sensory neurons
this system controls voluntary movements
Somatic nervous system
this system controls involuntary movements
Autonomic nervous system
this division handles fight-or-flight responses
sympathetic division
this division handles the rest or digest responses
parasympathetic division
this organ is found within the cranium or skull with its three parts
Brain
The Three Major Parts of the Brain
Forebrain
Midbrain
Hindbrain
this major division of the brain processes sensory information, helps with reasoning and problem-solving, and regulates autonomic, endocrine, and motor functions
Forebrain
this major division of the brain helps to regulate movement and process auditory and visual information
Midbrain
this major division of the brain helps to regulate autonomic function, relay sensory information, coordinate movement, and maintain balance and equilibrium
Hindbrain
The forebrain has two major parts called ___
telencephalon and diencephalon
Greek word meaning “end”
telos
Greek word meaning “brain”
enkephalos
the major components of the telencephalon
the cerebral cortex
the limbic system
the basal ganglia
olfactory system
the ___ is the folded or ridged outer layer of the cerebrum, and is composed of grey matter
Cerebral cortex
another name for neural cell bodies
grey matter
What is the difference between the cerebral cortex and the cerebrum?
The cerebrum is a collective term that
refers to the largest part of the four main parts of the brain (cerebrum, diencephalon, cerebellum, and brainstem), while the cerebral cortex is a specific term that refers to the outer layer of the cerebrum.
Its functions include sight, hearing, smell, and sensation, and controls higher functions such as speech, thinking, and memory
The cerebral cortex
___ is the uppermost part of the brain and is responsible for receiving and giving meaning to information from the sense organs, as well as controlling the body
Cerebrum
the 2 Cerebral Hemispheres
Left and Right Hemisphere
this hemisphere is for right-side control
Left Hemisphere
this hemisphere is for spoken and written language
Left Hemisphere
this hemisphere is for numerical and scientific skills
Left Hemisphere
this hemisphere is for reasoning
Left Hemisphere
this hemisphere is for left-side control
Right Hemisphere
this hemisphere is for musical and artistic skills
Right Hemisphere
this hemisphere is for space and pattern perception
Right Hemisphere
this hemisphere is for insight
Right Hemisphere
this hemisphere is for imagination
Right Hemisphere
this hemisphere is for generating mental images to compare spatial relationship
Right Hemisphere
The 4 lobes of the brain are:
Frontal Lobe
Parietal Lobe
Temporal Lobe
Occipital Lobe
this lobe is for executive functions, thinking, planning, organizing and problem-solving, emotions, behavioral control, and personality
Frontal Lobe
this part is for movement
Motor cortex
this part is for sensations
Sensory cortex
this lobe is for perception, making sense of the world, arithmetic, and spelling
Parietal lobe
this lobe is for vision
Occipital lobe
this lobe is for memory, understanding, and language
Temporal lobe
this system is the part of the brain involved in behavioral and emotional responses, especially when it comes to survival behaviors
Limbic System
Examples of survival behaviors include
feeding
reproduction
caring for the young
fight or flight responses
The structures in the limbic system includes:
the amygdala
hippocampus
thalamus
hypothalamus
basal ganglia
cingulate gyrus
It is a collection of cells near the base of the brain which processes fear, triggers anger and motivates the person to act
Amygdala
Is a small, curved formation in the brain that is involved in the formation of new memories and is also associated with learning and emotions
Hippocampus