Here we are discussing about important nerves that supplied to eyes,includes facial nerves,Auriculo temporal nerve,hypoglossal nerves….etc
let’s check
1. Facial Nerve;Important Nerves supplied to eyes
Facial nerve is covered by a short horizontal line joining the following two points given below
(a) A point at the middle of the anterior border of the mastoid process. The stylomastoid foramen lies 2 cm deep to this point
(b) A second point behind the neck of mandible. Here the nerve divides into
its five branches for the facial muscles.
2. Auriculotemporal Nerve
Auriculotemporal nerve is covered by a line drawn first backwards from the posterior part of the mandibular notch (site of mandibular nerve) across the neck of the mandible, and then upwards across the preauricular point.
3. Mandibular Nerve
Mandibular nerve is marked by a short vertical line in the posterior part of the mandibular notch just in front of the head of the mandible.
4. Lingual and Inferior Alveolar Nerves
Lingual nerve is marked by a curved line running downwards and forwards by joining these points.
(a) The first point on the posterior part of the mandibular notch, in line withthe mandibular nerve
(b) The second point a little below and behind the last lower molar tooth.
(c) The third point opposite the first lower molar tooth
The concavity in the course of the nerve is more marked between the points (b) and (c) and is directed upwards.
Inferior alveolar nerve lies a little below and parallel to the lingual nerve.
5. Glossopharyngeal Nerve
Glossopharyngeal nerve is marked by joining the following points.
(a) The first point on the anteroinferior part of the tragus
(b) The second point anterosuperior to the angle of the mandible
From point (b), the nerve runs forwards for a short distance above the lower border of the mandible. The nerve describes a gentle curve in its course.
6. Vagus Nerve
The nerve runs along the medial side of the internal jugular vagus vein. It is marked by joining these two points
(a) The first point at the anteroinferior part of the tragus
(b) The second point at the medial end of the clavicle
7. Accessory Nerve (Spinal Part)
Accessory nerve (spinal part) is marked by joining these four points.
(a) The first point at the anteroinferior part of the tragus
(b) The second point at the tip of the transverse process of the atlas
(c) The third point at the middle of the posterior border of the
sternocleidomastoid muscle
(d) The fourth point on the anterior border of the trapezius 6 cm above the
clavicle
8. Hypoglossal Nerve
Hypoglossal nerve is marked by joining these points.
(a) The first point at the anteroinferior part of the tragus
(b) The second point, posterosuperior to the tip of the greater cornua of thehyoid bone
(c) The third point, midway between the angle of the mandible and the
symphysis menti.
The nerve describes a gentle curve in its course.
9. Phrenic Nerve
Phrenic nerve is marked by a line joining the following points.
(a) A point on the side of the neck at the level of the upper border of the thyroid cartilage and 3.5 cm from the median plane
(b) The second point at the medial end of the clavicle
10. Cervical Sympathetic Chain
Cervical sympathetic chain is marked by a line joining the following points. (a) A point at the sternoclavicular joint
(b) The second point at the posterior border of the condyle of the mandible The superior cervical ganglion extends from the transverse process of the atlas to the tip of the greater cornua of the hyoid bone. The middle cervical ganglion lies at the level of the cricoid cartilage, and the inferior cervical ganglion, at a point 3 cm above the sternoclavicular joint.
11. Trigeminal Ganglion
Trigeminal ganglion lies a little in front of the preauricular point at a depth of about 4.5 cm.
For more Whatsapp now