Question | Answer |
What are general afferent fibers | fibers that have their cells of origin in cranial sensory ganglia |
what do general somatic afferent (GSA) fibers carry? | carry exteroceptive (i.e. pain, temp, and touch) and proprioceptive information from sensory receptors in skin, muscle, tendons, and joints |
General visceral afferent(GVA) fibers transmit what? | transmit impulses from visceral structures (i.e. hollow organs and glands) within the head neck and in the thoracic and abdominal cavities |
What are special afferent fibers | fibers arise from neurons found only in the ganglia of certain cranial nerves |
special somatic afferent (SSA) fibers convey what? | convey sensory information from special sense organs in the eye and ear (i.e. vision, hearing, and equilibrium) |
special visceral afferent (SVA) fibers carry what? | carry impulses from olfactory and gustatory receptors |
General efferent fibers arise from what? | from motoneurons in the brain stem and autonomic ganglia |
general efferent fibers innervate what | collectively, they innervate all musculature of the body, except the branchiomeric muscles that develop in the pharyngeal arches of the embryo |
general somatic efferent (GSE) fibers convey what | convey motor impulses to somatic skeletal mm (myotoic origin). In the head, the somatic musculature consists exclusively of tongue muscles and extraocular muscles |
General visceral efferent (GVE) fibers control what? | control smooth muscle and cardiac muscle and regulate glandular secretion. Parasympathetic preganglionic and postganglionic cells and fibers are components of four cranial nerves |
Special efferent fibers innervate what? | the musculature of branchiomeric origi. Arise from selected cranial nerve nuclei in the brain stem |
Special visceral efferent (SVE) fibers consist of what | consist of nerve componenets that innervate straited muscles derived from the branchial (pharyngeal) arches. These include muscles of the jaw, of facial expression, and of the pharynx and larynx. |
Are SVE fibers part of the autonomic nervous system? | NO |
Cranial nerve I: Olfactory S, M, or B | Sensory |
Cranial n. I: Olfactory fibers? | SVA |
Cranial n. II: Optic N. : S, M, or B? | Sensory |
Cranial n. II: Optic N. fibers? | SSA |
Cranial n. III: occulomotor n. : S, M, or B | Motor |
Crainial n III: occulomotor n. fibers? | GSE, GVE |
Cranial n. IV: Trochlear n. : S, M, or B? | Motor |
Cranial n. IV: Trochlear n fibers? | GSE |
Cranial n V: Trigeminal: S, M, B? | Both |
Cranial n V: Trigeminal n. fibers? | GSA, SVE |
Cranial n. VI: Abducens n.: S, M, or B? | Motor |
Cranial n. VI: Abducens n. fibers? | GSE |
Cranial n. VII: Facial n.: S, M, B? | Both |
Cranial n. VII: Facial n. fibers? | SVE, SVA, GVE, GSA |
Cranial n. VIII: Vestibulocochlear n.: S, M, or B? | Sensory |
Cranial n. VIII: Vestibulocochlear n. fibers? | SSA |
Cranial n. IX: Glossopharyngeal: S, M, or B? | Both |
Cranial n. IX: Glossopharyngeal n. fibers? | GVE, SVE, GVA, SVA, GSA |
Cranial n. X: Vagus n: S, M, or B? | Both |
Cranial n. X: Vagus n. fibers? | GVE, SVE, GVA, SVA, GSA |
Cranial n. XI: Accessory n.: S, M, or B? | Motor |
Cranial n. XI: Accessory n. fibers? | SVE |
Cranial n. XII: Hypoglossal n: S, M, or B? | Motor |
Cranial n. XII: Hypoglossal n. fibers? | GSE |
Name the cranial nerves that exit through the midbrain? | Cranial n. III: Occulomotor
Cranial n. IV: Trochlear |
Name the cranial nerves that exit through pons? | Cranial n. V: Trigeminal
Cranial n. VI: Abducens
Cranial n VII: Facial
Cranial VIII: Vestibulocochlear |
Name the cranial nerves that exit through the medulla? | Cranial n. IX: Glossopharyngeal
Cranial n. X: Vagus
Cranial n. XI: Accessory
Cranial n. XII: Hypoglossal |
What cranial n. exits from the sides of interpenduncular fossa | Cranial n. III: Occulomotor |
What cranial n emerges from the posterior surface of the midbrain and then wraps around to the anterior surface? | Cranial n. IV: Trochlear |
What cranial n. penetrates brachium pontis? | Cranial n. V: Trigeminal |
What cranial nn. exit from the niche of the cerebellopontine angle | Cranial n. VII: Facial
Cranial n. VIII: Vestibulocochlear |
What cranial nn. exit in the dorsolateral sulcus? | Cranial n. IX: Glossopharyngeal
Cranial n. X: Vagus
Cranial n. XI: Accessory |
What cranial n exits via ventrolateral sulcus? | Cranial n. XII: Hypoglossal n. |
What Cranial nerves cary SVA (4) | 1. Olfactory (I)
2.Facial (VII)
3. Glossopharyngeal (IX)
4. Vagus (X) |
Which cranial nerves carry SVE (5) | 1.Trigeminal (V)
2. Facial (VII)
3. Glossopharyngeal (IX)
4. Vagus (X)
5. Accessory |
Which cranial nerves carry SSA (2) | 1. Optic (II)
2. Vestibulocochlear (VIII) |
Which cranial nerves carry GSE (2) | 1. Trochlear (IV)
2. Occulomotor (III) |
Which cranial nerves carry GVE (4) | 1. Occulomotor (III)
2. Facial
3.Glossopharyngeal
4. Vagus |
Which cranial nerves carry GSA (4) | 1. Trigeminal
2. Facial
3. Glossopharyngeal
4.Vagus |
Which cranial nerves carry GVA (2) | 1. Vagus
2. glossopharyngeal |
Function of olfactory n? | SVA-smell |
Function of Occulomotor n. ? | GSE, GVE - raises eyelid (levator palpebrae superioris)
Eyeball- up, down, medial (superior, inferior, medial rec)
constricts pupil (ciliary & sphincter mm( |
Associated nuclei with occulomotor (III) n. | Oculomotor nucleus (GSE)
E-W Nucleus (GVE) |
trochlear n associated nuclei | trochlear nucleus (GSE) |
Abducens n associated nuclei | abducens nucleus (GSE) |
Facial n associated nuclei | facial motor nucleus (SVE)
Nucleus Solitarius (SVA)
Superior salivatory and lacrimal (GVE)
Spinal nucleus (GSA) |
Vestibulocochlear associated nuclei | vestibular nucleus (SSA)
Cochlear nucleus (SSA) |
Glossopharyngeal n associated nuclei | Inferior salivatory (GVE)
Nucleus ambiguus (SVE)
Nucleus solitarius-caudal part (GVA)
Nucleus solitarius (SVA)
Spinal nucleus of V (GSA) |
Vagus n associated nuclei | dorsal motor of X (GVE)
nuclei ambiguus (SVE)
nucleus solitarius (GVA)
nucleus solitarius (SVA)
spinal nucleus of V (GSA) |
Accessory associated nuclei | nucleus ambiguus (SVE)
nucleus ambiguus (SVE)
ext. subnucleus of nucleus ambiguus (SVE)
Accessory nucleus--spinal--(SVE) |