Cranial nerves summary Lab and OSCE

1. Identifications Mention
Cranial Nerves
Nucleus Branches
Supplying Attachment
Prepared By AbdulRahman AlTokhy Reviewed By Dr. Ahmed
CRANIAL NERVES

2. Cranial Nerve
Nucleus
- Deep origin –
M = Motor| P = Parasym. | S = Sensory| T = Taste
Exit from Brainstem
- Attachment -
Branches / Divisions Area of Distribution
- Supplying -
Oculomotor
(III)
- Motor Nucleus (M)
- Edinger Westphal Nucleus (P)
Midbrain
from interpeduncular
fossa.
- Superior division.
- Inferior division.
All Extra-ocular Muscles EXCEPT
Superior oblique & Lateral rectus Ms.
Trochlear
(IV)
- Motor Nucleus (M)
Midbrain
Dorsally,
below inferior
colliculus.
- Superior oblique (SO).
Trigeminal
(V)
- Motor Nucleus. (M)
- Main Sensory Nucleus (S)
- Spinal Nucleus Of Trigeminal(S)
- Mesencephalic Nucleus (S)
Pons
Ventral surface.
V1-Ophthalmic division.
- Lacrimal N.
- Frontal N.
- Nasociliary N.
Sensory to:
Lacrimal gland, upper eyelid,
Skin of forehead, &
Sensory branch to ciliary gangilion.
V2-Maxillary division.
- Cranial branches.
- Pterygopalatine fossa branches.
- Infra-orbital branches.
Sensory to:
Meninges,
Upper teeth, molars
Lower eyelid, Nose & Upper lip.
V3- Mandibular division.
- Motor branches.
- Auriculo-temporal N.
- Lingual N.
- Inferior alveolar N.
Temporalis, masseter, medial & lateral
ptyrgoid Ms.
General sensation of Ant. 2⁄3 of tongue
Sensation to Lower teeth.
Abducent
(VI)
- Motor Nucleus (M)
Pons
Medial part of lower
border between it &
Pyramid of Medulla
Oblongata.
- Lateral rectus (LR).

3. Facial
(VII)
- Motor Nucleus(M)
- Parasympathetic Nuclei(P)
- Nucleus Solitarius (T)
- Spinal Nucleus Of Trigeminal(S)
Pons
Cerebello-pontine
angle
Intracranial branches:
- Greater petrosal N.
- Nerve to stapedius.
- Chorda tympani.
Submandibular, Sublingual,
Lacrimal, Palate, Pharynx & Nose
glands.
Stapedius M.
Taste sensation of Ant. 2⁄3 of
tongue.
Extracranial branches:
- Temporal branch.
- Zygomatic branch.
- Buccal branch.
- Marginal mandibular branch.
- Cervical branches.
Face & scalp Ms.
Platysma M.
Posterior belly of digastric M.
Stylohyoid M.
Vestibulocochlear
(VIII)
- 4 Vestibular nuclei (S)
- 2 Cochlear nuclei (S)
Pons
Cerebello-pontine
angle
- Vestibular division.
- Cochlear division.
Sensory to Inner ear (hearing) &
Vestibular apparatus (balance).
Glossopharyngeal
(IX)
- Nucleus Ambiguous(M)
- Inferior Salivatory Nucleus(P)
- Nucleus Solitarius (T)
- Spinal Nucleus Of Trigeminal(S)
Medulla
oblongata
At posterolateral
sulcus
- Tympanic branch. Share in tympanic plexus.
- Meningeal branch. Sensory to Meninges.
- Lingual branch.
General & Taste sensations of
Post. 1⁄3 of tongue.
- Pharyngeal branch. Oropharynx sensation.
- Muscular branch. Stylopharyngeus M.
- Tonsillar branch. Palatine tonsil.
- Carotid branch. Carotid sinus & body.

4. Vagus
(X)
- Nucleus Ambiguous(M)
- Dorsal vagal nucleus(P)
- Nucleus Solitarius (T)
- Spinal Nucleus of Trigeminal(S)
Medulla
oblongata
At posterolateral
sulcus
Sup. Vagal Ganglion:
- Meningeal N.
- Auricular N.
Sensory to Meninges,
& ear structures.
Inf. Vagal Ganglion:
- Pharyngeal N.
- Superior laryngeal N.
- Carotid N.
Muscles of palate , pharynx & larynx
(Except Stylopharyngeus & Tensor Palatine),
Most post. taste sensation,
Cricothyroid M., carotid sinus & body.
Neck & thorax branches:
- Cardiac N.s
- Rt & Lt recurrent laryngeal N.
- Pulmonary, Cardiac &
Esophageal branches.
Smooth muscles of thorax & abdomen .
Sensation from viscera .
Accessory
(XI)
- Nucleus Ambiguous(M)
- Spinal Accessory Nucleus(M)
Medulla
oblongata
At posterolateral
sulcus
Cranial Part.
Muscles of palate , pharynx & larynx.
(Except Stylopharyngeus & Tensor Palatine)
Spinal Part. Supplies Sternomastoid & Trapezius Ms.
Hypoglossal
(XII)
- Motor Nucleus(M)
Medulla
oblongata
At anterolateral
sulcus.
1st group fibers.
- C1 Fibers -
Meninges, Thyrohyoid & Geniohyoid Ms
& form upper root of Ansa cervicalis.
2nd group fibers.
- Hypoglossal Fibers -
Styloglossus, Hyoglossus & Genioglossus Ms.
All intrinsic Muscles.
All tongue Muscles except Palatoglossus
supplied by Vagaus .

5. XI - Spinal Accessory N.
Attached to Trapezius M.

6. Lingual N.
Branch from Mandibular N.
X - Vagus N.
Parallel to Carotid A.
XII - Hypoglossal N.
Crosses Int. & Ext. Carotid A.
Inferior alveolar N
Branch from Mandibular N.

7. Ophthalmic division.
V – Trigeminal N.
Maxillary division.
Mandibular division.
Lingual N.
Inferior alveolar N
XI - Spinal Accessory N.
VII – Facial N.
X – Vagus N.

8. X - Vagus
XII- Hypoglossal
XI - Accessory
IX - Glossopharyngeal
VII - Facial
VIII - Vestibulocochlear
VI - Abducent
V - Trigeminal
III - Oculomotor
II - Optic
Ventral Surface

9. Dorsal Surface
IV - Trochlear