Changes

Cranial Nerves - Anatomy & Physiology (view source)

Revision as of 16:51, 11 August 2011

1,354 bytes added , 16:51, 11 August 2011

→‎Efferent Fibres - Motor

Line 21: Line 21:

===Efferent Fibres - Motor===

====General Somatic Efferent (GSE)====

−

This type of nerve fibre is mainly found in nerves supplying skeletal muscles.

+

This type of nerve fibre is mainly found in nerves supplying [[Muscles_-_Anatomy_%26_Physiology#Skeletal_Muscle|skeletal muscles]]. Motor fibres such as these undertake numerous roles within the body such as control over the external ocular muscles via the oculomotor nerve (cranial nerve III), the trochlear nerve (cranial nerve IV) and the abducent nerve (cranial nerve VI); or for example the muscles around the dorsal and ventral neck including the brachiocephalicus, trapezius, omotransversarius and the sternocephalicus which are all supplied by the accessory nerve (cranial nerve XI).

−

+

====General Visceral Efferent (GVE)====

+

This type of nerve fibre is found in nerves supplying [[Muscles_-_Anatomy_%26_Physiology#Smooth_Muscle|smooth muscle]], [[Muscles_-_Anatomy_%26_Physiology#Cardiac_Muscle|cardiac muscle]] and glands. Sympathetic innervation for this type of nerve fibre comes directly from the cranial cervical ganglion. However, parasympathetic innervation comes from several cranial nerves including the oculomotor nerve (cranial nerve III), the vestibulocochlear nerve (cranial nerve VIII), the glossopharyngeal nerve (cranial nerve IX) and the vagus nerve (cranial nerve X). Examples of where this type of fibre functions include the pupillary sphinter via the oculomotor nerve, glands of the nasal/oral cavity via the vestibulocochlear and glossopharyngeal nerves and thoracic/abdominal viscera via the vagus nerve.

*'''General Somatic Motor (GSM)'''

Line 41: Line 42:

Sensory cortex —→ Thalamus —→ Trigeminal nuculi —→ Trigeminal ganglion —→ Skin etc

−

===Special sensory fibres (SSS + SVS):===

Eca02csb

6,273

edits