Please enable JavaScript.
Coggle requires JavaScript to display documents.
HalimaAbdi.Nervous system (Senses (the eye components (Visual Pathway…
HalimaAbdi.Nervous system
Senses
the types of receptors based on stimulus origin:Exteroreceptors, Interoceptors, proprioceptors
the types of receptors based on stimulus type:Thermorecptors(cold), photoreceptors(light), chemoreceptors(chemicals), nociceptor(sensitive to pain), mechanoreceptor(sensitive to touch)
the eye components
Visual Pathway
Cornea
Lens
Retina
Optic Nerve
Optic Chiasmial
Iris, Cornea, Pupil, Sclera, Conjuctiva
olfaction pathway
Olfactory bulb
Olfactory tract
Limbic region-emotional brain
Primary olfactory cortex in temporal lobe
Components
Roof of nasal cavity, nasal mucosa
gustation components
Sensation of Taste, Insular cortex, Gustatory system
Gustation pathway
Taste buds w/ receptor cells, three cranial nerves
Medulla oblingata
Thalamus
ear components
Auricle (Pinna), Ear Canal, Tympanic Membrane (Eardrum), Auditory (Middle Ear), Cochlea
Hearing Pathway
Medulla Oblungata
Pons
Cochlea Nerve
Cochlea
Middle Ear
Midbrain
Thalamus
Primary auditory cortex in temporal lobe
Nervous system organization
CNS main structures: Brain and spinal cord
Functions:Receives incoming sensory signal/interprets signals
PNS main structures: Mainly nerves
Functions: Communication lines that link all regions of body to CNS
somatic division:Conducts impulses from receptors to CNS
autonomic division:Conduct impulses from the CNS
Sympathetic: Mobilizes body system during activitives
Parasympathetic: Conserves engery
Neurons
major components of a neuron
Cell body: Contains the nucleus , Axons: Carry information to other neurons, Dendrites: Combine Information
structural types of neurons
Bipolar neurons:Have two processes that extend from opposite side
Unipolar:Have short, single process
Multipolar:Have more than two processes
functional types of neurons
Interneurons
Link together, form complex neuronal pathway
Motor neurons
Carry impulses away from the CNS to effector organs
Sensory neurons
Transmit impulses toward CNS from sensory receptors in PNS
Anatomy of nervous system
nerve components:CNS, PNS
glial cells: Surround neurons and provide support
location and brief description:Brain, spinal cord, meninges: Responsible for control of body and communication