CN V Trigeminal Mixed Flashcards
What is the largest CN?
Trigeminal
How many muscles does the branchial motor portion innervate?
8 total
Name the 4 mastication muscles
Temporalis
Masseter
Medial pterygoid
Lateral pterygoid
Name 2 deglutition muscles
Anterior belly of the digastric
Mylohyoid
What are 2 additional muscles innervated by the branchial motor besides the mastication and deglutition muscles?
Tensor veli palatini
Tensor tympani
What is the apparent origin of trigemnial?
Upper anterolateral portion of pons
What is the larger and superior root of trigeminal?
Sensory root
What is the smaller root that comes from the nucleus of origin?
Motor root
The sensory fibers consist of central processes from pseudounipolar neurons in what ganglion?
Gasserian or Semilunar ganglion
The trigmenal ganglion is located in the dura mater in the trigeminal impression of what bone?
Petrosal portion of temporal bone
What is the largest sensory ganglion in the body?
Trigeminal ganglion
What holds the primary sensory neuron of the trigeminal n?
Trigeminal ganglion
The axon of the trigeminal ganglion synapses with what 3 nuclei of termination?
Mesencephalic
Pontine
Spinal
This nucleus of termination is mid pons
Pontine
This nucleus of termination is located lateral to the cerebral aqueduct and anterior to the superior and inferior colliculi
Mesencephalic
This nucleus of termination is in the medulla oblongata
Spinal
The spinal nucleus is continuous with what?
Substantia gelatinosa of Roland
The spinal nucleus of trigeminal is also for what 4 CN nerves?
Trigeminal (duh)
Facial
Glossopharyngeal
Vagus
What is another term for peripheral processes?
Dendrites
The dendrites divide into what 3 divisions?
Ophthalmic
Maxillary
Mandibular
This division is the upper, smallest, and purely sensory
Ophthalmic
This nerve is intermediate in size, position, and purely sensory
Maxillary
This division is the largest and mixed
Mandibular
