Please enable JavaScript.

Coggle requires JavaScript to display documents.

Nervous System Savanah Echeverria Period 5 - Coggle Diagram

- - - - SUBDIVISIONS
        
        peripheral nervous system
        
        sensory Neurons - Sensory organs to CNS
        
        motor neurons- CNS to muscle and glands somatic- controls voluntary movements autonomic- controls involuntary responses
        
        Sympathetic Division-- system is associated with the fight-or-flight response
        
        Parasympathetic division-- activity is referred to by the epithet of rest and digest
        
        central nervous system
        
        Spinal cord- conducts signals to and from the brain and controls reflex activities
        
        Brain- receives and processes sensory info , initiates responses, stores, memories and generate thought and emotion
- - - - AUTONOMIC FUNCTIONS: regulates digestion, urination, body temperature, heart rate, and dilation/ contraction of blood vessels
      - SENSORY FUNCTIONS:monitors sensation of touch, pressure, temperature and pain.
        
        CRANIAL AND SPINAL NERVES
        
        31 pairs of the spinal nerves. 8 cervical , 12 thoracic, 5 lumbar, 5 sacral, and coccygeal
        
        DORSAL ROOT - carries sensory impulses to the brain
        
        VENTRAL ROOT- carries motor impulses form brain
        
        Cranial nerves (12) & Functions
        
        EYES INVOLVEMENT :eyes: :eyeglasses:
        II) OPTIC NERVE: transmit info to the brain regarding vision :eyes:III III)OCULOMOTOR NERVE: provides muscle movement of the eyes and upper eyelid aka a extraocular muscle :stuck_out_tongue_winking_eye:I IV)TROCHLEAR NERVE: it powers the contralateral superior oblique muscle that allows the eye to point downward and inward
        
        V) TRIGEMINAL NERVE: helps a person chew and clench teeth and gives sensation to muscles in the tympanic membrane of the ear :smile:
        
        Its sensory division has three parts connecting to sensory receptor sites on the face: 1)The ophthalmic part gives sensation to parts of the eyes, including the cornea, mucosa in the nose, and skin on the nose, the eyelid, and the forehead. 2)The maxillary part gives sensation to the middle third of the face, side of the nose, upper teeth, and lower eyelid. 3)The mandibular part gives sensation to the lower third of the face, the tongue, mucosa in the mouth, and lower teeth
        
        I) OLFACTORY NERVE: transmit info to the brain regarding sense of smell : :nose::skin-tone-4:
        
        VI) ABDUCENS NERVE: helps control eye movements and it helps the lateral rectus muscle also extraocular muscles to turn the gaze outward.
        
        VIII) VESTIBULOCOCHLEAR NERVE : involve hearing
        
        TWO COMPONENTS OF VESTIBULOCOCHLEAR
        VESTIBULAR- helps the body senses changes in the position of the head with regard to gravity / maintain balance.
        COCHLEAR- helps with hearing. the inner hair cells and the basilar membrane vibrate in response to sounds and determine freg=quency and magnitude of the sound
        
        VII) FACIAL NERVE: movement of muscles produce facial expression, movement of the lacrimal, submaxillary , submandibular glands, sensation of the external ear , and sensation of taste.
        
        IX) GLOSSOPHARYNGEAL: Sensory function -receives info from the throat, tonsils , middle ear, back of tongue. Involves sensation of taste
        Motor division- provides the muscles of the throat widen and shorten
        X) VAGUS NERVE: Sensory- provides sensation to the outer part of the ear, the throat, heat, and abdominal organs
        Motor -provides movement to the throat and soft palate
        Parasympathetic -regulates heart rhythm and innervates the smooth muscles in the airway and lungs.
        
        XI) ACCESSORY NERVE : provides motor functions to some muscles in the neck and it controls muscles that allow person to rotate, extend , and flex the neck/ shoulders
        XII) HYPOGLOSSAL: is a motor nerve that supplies the tongue muscles and it originates in the medulla
      - MOTOR FUNCTION: directs your body's voluntary muscle movements