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PT 702 Skull and Cranial Nerves Lecture

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6 bones that make up the cranial vault
Frontal
Parietal
Occipital
Temporal
Sphenoid
Ethmoid
The 4 sutures that make up the skull
Coronal
Sagittal
Squamousal
Lambdoidal
Suture between the frontal and parietal bones
Coronal
Suture between the 2 parietal bones
Sagittal
Suture between the parietal and temporal bones
Squamousal
Suture between the parietal and occipital bones
Lambdoidal
8 bones of the face
Nasal bones
Maxilla bones
Zygomatic bones
Mandible
Lacrimal bones
Inferior nasal conchae
Vomer bone
Palatine bones
Boundaries of the orbit
Frontal
Zygomatic
Maxilla
Lacrimal and ethmoid
Sphenoid
Roof of the orbit
Frontal
Lateral wall of the orbit
Zygomatic bones
Floor and part of the medial wall of the orbit
Maxilla
Medial wall of the orbit
Lacrimal bones
Ethmoid bones
Posterior wall of the orbit
Sphenoid bone
4 features of the orbit
Supraorbital foramen or notch
Optic foramen
Supraorbital and infraorbital fissure
Nasolacrimal canal
Foramen in the supraciliary arch
Supraorbital foramen or notch
Foramen in the upper medial orbit
Optic foramen
Fissures in below the optic foramen
Supraorbital and infraorbital fissures
Canal that communicates between the orbit and nasal cavity
Nasolacrimal canal
3 boundaries of the nasal cavity
Nasal bones
Maxillary bones
Nasal septum
(vomer and perpendicular plate of ethmoid)
Roof of nasal cavity
Nasal bones
Lateral walls of nasal cavity
Maxillary bones
Medial wall of nasal cavity
Nasal septum (vomer and perpendicular plate of ethmoid)
Features of the nasal cavity
Nasal conchae (superior, middle and inferior nasal conchae)
Projections from the lateral walls of the nasal cavity
Nasal conchae
Superior nasal conchae is part of what bone?
Ethmoid
Middle nasal conchae is part of what bone?
Ethmoid
Inferior nasal conchae does what?
Separate bones
Alveolar processes are features of what bones?
Maxilla and mandible (sockets for teeth)
Foramina on the mandible
Mental foramen
Foramina on the maxilla
Infraorbital foramen
Foramina on the frontal bones
Supraorbital foramen
5 features of the mandible
Condyloid process (TMJ)
Coronoid process
Ramus, body and angle
Genoid tubercle
Manibular foramen
Highest fossa in cranial vault holding the frontal lobes
Anterior cranial fossa
Middle fossa in cranial vault holding the temporal lobes
Middle cranial fossa
Lowest fossa in cranial vault holding the cerebellum and brain stem
Posterior cranial fossa
Spaces within the skull bones
Paranasal sinuses
Paranasal sinuses effect on bones and voice
Makes bones lighter and adds resonance to voice
Paranasal sinuses are lined with
muscous membranes
Paransal sinuses are continuous with
the nasal cavity
4 types of paranasal sinuses
Frontal
Ethmoid
Sphenoid
Maxillary
Sinuses that could be 3 to 13 of the them
Ethmoid
Purpose of skull foramina
Allows vessels and cranial nerves to exit the cranial vault
CN I
Olfactory nerve
CN II
Optic nerve
CN III
Oculomotor nerve
CN IV
Trochlear nerve
CN V
Trigeminal nerve
CN VI
Abducens nerve
CN VII
Facial nerve
CN VIII
Vestibulocochlear nerve
CN IX
Glossopharyngeal nerve
CN X
Vagus nerve
CN XI
Accessory nerve
CN XII
Hypoglossal nerve
7 cranial nerves that are sensory
CN I, II, V, VII, VIII, IX, X
3 cranial nerves that are only sensory
CN I, II, VIII
9 cranial nerves that are motor
CN III, IV, V, VI, VII, IX, X, XI, XII
5 cranial nerves that are only motor
CN III, IV, VI, XI, XII
4 cranial nerves that are mixed
CN V, VII, IX, X
Nerve located in upper nasal cavity and travels through the cribiform plate (transmits gaseous impulses to olfactory cortex)
CN I (olfactory nerve-sensory)
Sensory nerve that senses sight and travels through the optic canal, enters the back of the eye and transmits light impulses to the visual cortex)
CN II (optic nerve)
Motor nerve that elevates, depresses and adducts the eye and travels through the superior orbital fissure (pupillary constrictor muscle)
CN III (oculomotor nerve)
Motor nerve that rotates the eye down and out and travels through the superior orbital fissure (superior oblique muscle)
CN IV (trochlear nerve)
Sensory and motor nerve that provides sensation and mastication to the face and separates into 3 divisions while traveling through 7 foramina
CN V (trigeminal nerve)
Sensory nerve providing sensation to the upper face and eye traveling through the superior orbital fissure and supraorbital foramen/notch
CN V1 (opthalmic nerve)
Sensory nerve that provides sensation to the middle of the face and upper teeth and travels through the foramen rotundum and infraorbital foramen
CN V2 (maxilla nerve)
Sensory and motor nerve providing sensation to the lower face, lower teeth and anterior 2/3 of tongue and mastication traveling through the foramen ovale, mandibular foramen and mental foramen
CN V3 (mandibular nerve)
Motor nerve that abducts the eye and travels through the superior orbital fissure (lateral rectus muscle)
CN VI (abducens nerve)
Sensory and motor nerve that provides sensation to the anterior 2/3 tongue and facial expression; para/sympathetic to lacrimal and salivary glands traveling through the internal acoustic meatus and stylomastoid foramen
CN VII (facial nerve)
Sensory nerve providing hearing and equilibrium and travels through the internal acoustic meatus innervating semicircular canals and cochlea transmitting sound impulses to auditory cortex
CN VIII (vestibulocochlear nerve)
Sensory and motor nerve that provides taste and sensory to posterior 1/3 of tongue and pharynx muscle (stylopharyngeus); para/sympathetic to parotid gland traveling through the jugular foramen
CN IX (glossopharyngeal nerve)
Sensory and motor nerve to the organs of the neck, thorax and abdomen (para/sympathetic) traveling through the jugular foramen
CN X (vagus nerve) widest distribution
Motor nerve innervating trapezius and sternocleidomastoid muscles traveling through foramen magnum
CN XI (accessory nerve)
Motor nerve to all tongue muscles (both intrinsic and extrinsic) traveling through hypoglossal canal
CN XII (hypoglossal nerve)