Search results
Results from the WOW.Com Content Network
Nerve supply [ edit ] Sensation of the outer surface of the tympanic membrane is supplied mainly by the auriculotemporal nerve , a branch of the mandibular nerve ( cranial nerve V 3 ), with contributions from the auricular branch of the vagus nerve ( cranial nerve X ), the facial nerve (cranial nerve VII), and possibly the glossopharyngeal ...
In human embryo, a double innervation is seen only in the first pharyngeal arch. The mandibular nerve is the post-trematic nerve of the first arch and chorda tympani (branch of facial nerve) is the pre-trematic nerve. This double innervation is reflected in the nerve supply of anterior two-thirds of tongue which is derived from the first arch. [12]
To an impala, the pinna is useful in collecting sound. In animals, the function of the pinna is to collect sound, and perform spectral transformations to incoming sounds which enable the process of vertical localization to take place. [2] It collects sound by acting as a funnel, amplifying the sound and directing it to the auditory canal.
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear.The adult human ear canal extends from the auricle to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.
This nerve, as it courses posteriorly to the condylar head, is frequently injured in temporomandibular joint (TMJ) surgery, causing an ipsilateral paresthesia of the auricle and skin surrounding the ear. It is the main nerve that supplies the TMJ, along with branches of the masseteric nerve and the deep temporal.
It is often assumed the reflex is a vestigial Preyer reflex (also known as the pinna reflex). [ 6 ] [ 7 ] A study on auriculomotor activity found that in the presence of sudden, surprising sounds, the muscles around the ear closest to the direction of the sound would respond by moving involuntarily, causing the pinna to be pulled backwards and ...
Nerve fibers then relay the daylight information from the SCN to the paraventricular nuclei (PVN), then to the spinal cord and via the sympathetic system to superior cervical ganglia (SCG), and from there into the pineal gland. The compound pinoline is also claimed to be produced in the pineal gland; it is one of the beta-carbolines. [30]
Composition and central connections of the spinal nerves; Pathways from the brain to the spinal cord; The meninges of the brain and medulla spinalis; The cerebrospinal fluid; The cranial nerves. The olfactory nerves; The optic nerve; The oculomotor nerve; The trochlear nerve; The trigeminal nerve; The abducens nerve; The facial nerve; The ...