Unit 3.7 Flashcards
Olfaction is the sense of _ and has the association with the sense of
Olfactory neurons are located in the
Olfactory axons pass through ethmoid foraminae of the cribriform plate to enter the cranial vault to create the
CN 1 Olfactory
Nasal mucosa
Olfactory bulb
Involved with the sense of vision
Neurons are located in the retina
Axons project the rough the optic nerve of the sphenoid bone
Upon entering the cranial vault some fibers from the right cross to the left and vice versa which creates the _
Axons that continue toward the midbrain and occipital lobe are referred to as
CN II Optic
Optic chiasm
Optic tract
Is the motor to most muscles of the eye except superior oblique (CN4) and lateral rectus (CN6)
Nuerons are located in the CN nuclei III in brain
Axons project through the superior orbital fissure between wings of the sphenoid bone
CN III Oculomotor
Is the motor to the superior oblique
Neurons are located in the CN nuclei IV in the brain
Axons project through the superior orbital fissure between the wings of the sphenoid bone
CN IV trochlear
Composed of three branches (V1, V2, V3)
The sensory to the ophthalmic region
The sensory to the maxillary region
The motor to the muscles of the mastication
Project through the supraorbital fissure between the wings of the sphenoid bone
Axons project through the foramen rotundum of the sphenoid bone
Axons project through the foramen ovals of the sphenoid bone
CN V - Trigeminal
V1
V2
V3
V1
V2
V3
Motor to the lateral rectus muscle of the eye
Neurons located in the CN VI nuclei in the pons
Axons project through the superior orbital fissure of the sphenoid bone
CN VI Abducens
Motor to the muscles of facial expression and sensory to the tongue
Neurons are located in the CN nuclei VII- pons
Axons project through the internal acoustic meatus of the petrosal portion of the temporal bone
Paralysis of this nerve is called Bell’s palsy which includes loss of motor innervation to muscles of facial expression and the stapedius muscle of the ear
Paralysis of the stapedius results in sensitive hearing
CN VII- facial
Has two branches which are the vestibular and cochlear
The cochlear branch provides the sense of hearing
The vestibular branch provides the sense of equilibrium
Nuerons are located in the CN nuclei V111- pons and medulla oblongata
Axons project through the internal acoustic meatus of the petrosal portion of the temporal bone
Auditory pathways projects back toward the thalamus, midbrain and temporal lobe
CN VIII- vestibuleocochlear
Provides sensory (taste) to the posterior 1/3 of the tongue and sense blood pressure, o2, and ph
Provides motor to the pharyngeal constrictor muscles
Neurons are located in the CN nuclei IX in the medulla oblongata
Axons project the rough the jugular foramen located between the occupital and temporal bones
CN IX - glossopharyngeal
Provides autonomic parasympathetic supple to the organs of thorax and abdominopelvic cavity
Neurons are located in multiple CV X nuclei within the brain medulla oblongata Axons project
Axons project through the jugular foramen and located between the occipital and temporal bone
CN X vagus
Provides motor supply to the muscles of the neck
Neurons are located in the CN XI nuclei- medulla oblongata
Axons project through the jugular foramen located between the temporal and occipital bones
CN XI Accessory
Provides motor supply to the muscles of the tongue
Neurons are located in the CN XII. Medulla oblongata
Axons project the rough the hypoglossal canal located near to the occipital condyles
Paralysis of this nerve is evident when there is deviation off center to one side when protruding the tongue
CN XII hypoglossal
