File:Human week 10 fetus 12.jpg

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Human Female Fetus - Olfactory Nerve (10 week)

Large image version of plane D, close to midline (Stain - Haematoxylin Eosin) 0.5 mm scale bar.

Olfactory Nerve - (CN I) formed from the nasal placode, the olfactory receptor neurons form an afferent nerve fibre transmitting the sense of smell to olfactory bulb (bulbus olfactorius).


Cranial Nerves 
Nerve Number Name Type Origin Function
CN I Olfactory sensory telencephalon smell placode
CN II Optic sensory retinal ganglial cells vision
CN III Oculomotor motor anterior midbrain extraocular muscles eye movements and pupil dilation (motor)
CN IV Trochlear motor dorsal midbrain extraocular muscles (superior oblique muscle)
CN V Trigeminal motor/sensory pons touch, mastication
CN VI Abducent motor extraocular muscles control eye movements (lateral rectus muscle)
CN VII Facial motor/sensory pons facial expression, taste (tongue anterior and central regions) regulate salivary production.
CN VIII Acoustic sensory vestibular and cochlear nuclei hearing, placode
CN IX Glossopharyngeal motor/sensory medulla swallowing and speech, taste (tongue posterior region)
CN X Vagus motor/sensory medulla larynx and pharynx muscles (speech and swallowing), regulates heartbeat, sweating, and peristalsis
CN XI Accessory motor motor neurons sternocleidomastoid and trapezius muscles
CN XII Hypoglossal motor motor neurons tongue muscles (speech, eating and other oral functions)
Links: Cranial Nerve Development | Smell Development

Related Images

Human- fetal week 10 planes icon.jpg

Fetus (week 10) Planes A (most lateral), B (lateral), C (medial) and D (midline) from lateral towards the midline.

Image Source: UNSW Embryology, no reproduction without permission.



Cite this page: Hill, M.A. (2024, April 22) Embryology Human week 10 fetus 12.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Human_week_10_fetus_12.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current23:29, 17 June 2012Thumbnail for version as of 23:29, 17 June 20121,200 × 900 (349 KB)Z8600021 (talk | contribs)==Human Female Fetus Olfactory Nerve (10 week)== Large image version of plane D, close to midline (H&E stain). 0.3 mm scale bar Note: {{10wkFetus}}