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The Olfactory Nerve (CN I) and Olfactory Pathway
The olfactory nerve (CN I) is the first and shortest cranial nerve. It is a special visceral afferent nerve, which transmits information relating to smell. Embryologicallly, the olfactory nerve is…
The Cranial Foramina
…structures that are listed below (from superior to inferior): Lacrimal nerve (branch of the ophthalmic nerve, the first division of the trigeminal nerve) Frontal nerve (branch of the ophthalmic nerve,…
The Facial Nerve (CN VII)
…geniculate ganglion (a ganglion is a collection of nerve cell bodies). Lastly, the nerve gives rise to: Greater petrosal nerve – parasympathetic fibres to mucous glands and lacrimal gland. Nerve…
The Mandibular Division of the Trigeminal Nerve (CNV3)
…of the two nerves. The portion of the inferior alveolar nerve that runs through the mandibular canal has been removed. Lingual Nerve This branch of the trigeminal nerve carries general…
The Trigeminal Nerve (CN V)
…four terminal branches in the infra-temporal fossa: buccal nerve, inferior alveolar nerve, auriculotemporal nerve and lingual nerve. These branches innervate the skin, mucous membrane and striated muscle derivatives of the…
The Vagus Nerve (CN X)
The vagus nerve is the 10th cranial nerve (CN X). It is a functionally diverse nerve, offering many different modalities of innervation. It is associated with the derivatives of the…
The Cervical Plexus
…around the accessory nerve, and passes superiorly, close to the posterior border of the sternocleidomastoid. Supraclavicular Nerves The supraclavicular nerves are a group of nerves formed from the C3 and…
The Cutaneous Innervation of the Lower Limb
…receive cutaneous innervation from branches of the tibial nerve, common fibular nerve and femoral nerve: Deep fibular nerve – supplies the space between 1st and 2nd toes on the dorsum…
The Brachial Plexus
… Suprascapular nerve Nerve to subclavius Lateral pectoral nerve Medial pectoral nerve Medial cutaneous nerve of arm Medial cutaneous nerve of…
The Sacral Plexus
…splanchnic nerves, which innervate the abdominal viscera): Nerve to piriformis Nerve to obturator internus Nerve to quadratus femoris Clinical Relevance – Lumbosacral Plexopathy A lumbosacral plexopathy is a disorder affecting…