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Nervous System (Cranial Nerves (Abducens Nerve
Eye movement, outward…
Nervous System
Cranial Nerves
Abducens Nerve
- Eye movement, outward movement (looking to the side)
Facial Nerve
- Moves muscles used for facial expressions
- Providing a sense of taste
- Supplying glands in your neck or head area
Trigeminal Nerve
- Ophthalmic. The ophthalmic division sends sensory information from the upper part of your face, including your forehead, scalp, and upper eyelids.
- Maxillary. This division communicates sensory information from the middle part of your face, including your cheeks, upper lip, and nasal cavity.
- Mandibular. The mandibular division has both a sensory and a motor function. It sends sensory information from your ears, lower lip, and chin. It also controls the movement of muscles within your jaw and ear.
Vestibularcochlear Nerve
- Cochlear portion. Specialized cells within your ear detect vibrations from sound based off of the sound’s loudness and pitch. This generates nerve impulses that are transmitted to the cochlear nerve
- Vestibular portion. Another set of special cells in this portion can track both linear and rotational movements of your head. This information is transmitted to the vestibular nerve and used to adjust your balance and equilibrium.
Trochlear Nerve
- Controls superior oblique muscle, muscle thats responsible for downward, outward and inward eye movements
Glossopharyngeal Nerve
- sending sensory information from your sinuses, the back of your throat, parts of your inner ear, and the back part of your tongue
- providing a sense of taste for the back part of your tongue
- stimulating voluntary movement of a muscle in the back of your throat called the stylopharyngeus
Oculomotor Nerve
- Muscle function and pupil response
- Helps your eyes move and focus on objects
- Helps control the size of your pupil as it responds to light
Vagus Nerve
- Control of the heart, lungs, and digestive tract
Optic Nerve
- sensory nerves that involve vision
Accessory Nerve
- Controls some of the muscles in your neck and shoulder
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Hypoglossal Nerve
- Responsible for most of the muscle movement in your tongue
Major Parts of the brain
Occipital lobe
- Visual processing area of the brain
Somatosensory Cortex
- Receives all sensory input from the body
- Sense feelings in our skin
Parietal Lobe
- Processing sensory information
- Interpreting visual information and processing language and mathematics
Frontal Lobe
- Controls emotional expression, problem solving, memory, language, judgement, and sexual behaviors
Temporal Lobe
- Sound processing, auditory and speech comprehension
Motor cortex
- Involved in planning, control, and execution of voluntary movement
Ventricles of the brain
- Spaces filled with cerebral spinal fluid to cushion and protect the brain
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Major Functions
Integration
- The nervous system processes and interprets sensory input and decides what should be done at each moment
Motor Output
- The nervous system activates effector organs (Muscles and glands) to cause a response
Sensory Input
- The nervous system uses its millions of sensory receptors to monitor changes occuring both inside and outside the body
Layers of the meninges
Arachnoid Mater
- Middle layer of the three meninges
Pia Mater
- The delicate innermost membrane enveloping the brain and spinal cord
Dura mater
- tough outermost membrane enveloping the brain and spinal cord
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