It is the lower jaw bone. It has lower teeth and is the biggest, strongest and lowermost bone of the face. Parts It is composed of 3 parts: a horizontally-oriented body and 2 vertically oriented rami and is horseshoe shaped bone. Body The body of the mandible is U-shaped and it presents: Two [...]
Among the 3 pairs of salivary glands, viz. parotid, submandibular and sublingual, the parotid (para = around, otic = ear) gland is the largest. It's composed just about wholly of serous alveoli. It weighs about 25 grams. It's lobulated and yellowish brown. Location It is location is in the pyramidal fossa, posterior to the ramus [...]
They can be called the main arteries of the head and neck. There are 2 common carotid arteries: left and right. Common Carotid Artery Origin The right common carotid artery originates behind the sternoclavicular joint, in neck from brachiocephalic trunk (innominate artery). The left common carotid artery originates directly from the arch [...]
It's a mixed nerve, i.e., composed of both the motor and sensory fibres but mostly it is motor. Vagus nerve is the 10th cranial nerve. Its area of distribution goes past the head and neck-to the thorax and abdomen. It's the longest and most widely distributed cranial nerve. It's so called due to its wide-ranging [...]
Skin of the scalp is thick and dense; it is intimately connected to the subcutaneous tissue. It contains hairs and large number of sebaceous glands. Arrangement and distribution of hairs on the scalp is a secondary sexual character. Skin of Scalp Excessive secretion of testosterone produces loss of hairs, thus causing alopecia (baldness) [...]
The supratrochlear nerve, among the two terminal branches of the frontal nerve, is the smaller one and flows anteriorly over the trochlea and tendon of the superior oblique muscle along with the supratrochlear artery. Supratrochlear Nerve Origin The supratrochlear nerve emerges from fibers of the frontal nerve, the largest division of the ophthalmic [...]
Origin The transverse cervical nerve is a division of the cervical plexus originating from the anterior rami of cervical nerves C2 and C3. The transverse cervical nerve is otherwise known as the Superficial cervical nerve Cutaneous cervical nerve Anterior cutaneous cervical nerve of the neck Transverse cervical nerve Insertion It appears from under [...]
The basilar part of occipital bone is located directly posterior towards the body of the sphenoid in the midline. It spreads out posteriorly towards the foramen magnum and via the temporal bones is bounded laterally. The pharyngeal tubercle is protuberant on the basilar portion of the occipital bone and is a bony protrusion for the [...]
Three set of veins drain the venous blood through the thyroid gland: Superior Thyroid Vein It arises at the upper pole of the thyroid lobe, travels upwards as well as laterally, and drains inside the internal jugular vein. The superior thyroid vein and the branches of the superior thyroid artery correspond to each other. It [...]
The optic canal is the rounded gap at the tip of the pyramid shaped. It opens into the middle cranial fossa and is surrounded medially via the body of the sphenoid as well as laterally via the lesser wing of the sphenoid. Optic Canal Structure Approximately the optic canal is 0.4 to 1 [...]