Head Flashcards
What cranial nerves are motor only?
III, IV, VI, XI, XII
Where are cell bodies of sensory neurons of the cranial nerves located?
peripheral sensory ganglia: Trigeminal (V), Geniculate (VII), Vestibular (VIII), Spiral (VIII), Super and Inferior (IX), Super and Inferior (X)
Where are motor cell bodies of cranial nerves located?
Brainstem nuclei
Parasympathetic cranial nerves?
Carried by CN III, VII, IX, X only
Define GSA
Sensation of motor structures (skin, skeletal muscle, fascia, joint capsules, ligaments, tendons, aponeuroses, periosteum), sensation from mucosal lining of oral and nasal cavities, nasal sinuses, sensation from mucosal lining of pharynx, esophagus, larynx, trachea, middle ear
Define GVA
sensation from visceral structures including smooth muscle, cardiac muscle, glands, viscera
Define SA
special sensory, sensory from specialized receptors in the head which are related to our special senses (vision, hearing, eqbm, taste, smell)
What cranial nerves contain SA?
I, II, VII, VIII, IX, X
Define GSE
motor innervation to skeletal muscle in the head derived from somite mesoderm
Define GVE
parasympathetic motor innervation to smooth muscle and glands of the head.
Cranial nerves that contain GVE
III, VII, IX, X
How do sympathetic nerves travel in the head?
Not on cranial nerves. They have ascended from the superior cervical ganglion where they synapsed with postganglionic neurons. They then form the carotic periarterial plexus and travel along branches of the external and internal carotid arteries.
Define Branchiomeric (BE)
motor innervation to skeletal muscle in the head derived from branchial (pharyngeal arch) mesoderm
What muscles are innervated by the first pharyngeal arch?
Muscles of mastication, mylohyoid, anterior belly of digastric muscle, tensor veli pallatini muscle, tensor tympani muscle
What muscles are innervated by the second pharyngeal arch?
Muscles of facial expression, posterior belly of digastric muscle, stylohyoid muscle, stapedius muscle
