In this article we will discuss about the various parts of sphenoid bone which belongs to human skull. It resembles a bat or butterfly with outstretched wings. It takes part in the formation of orbit, middle cranial fossa, infra temporal, temporal and pterygopalatine fossae. It is a pneumatic bone - containing sphenoidal air sinus in its body. Parts of the [...]
The lymph nodes draining the head and neck are classified into superficial and deep nodes. Superficial lymphatics follow superficial veins while deep lymphatics follow arteries. I. Superficial Nodes: Drain superficial tissues of head and neck. A. Circular Group: Arranged in the form of a circle round the neck called "Pericervical collar". It includes: (a) Submental Nodes: Lie in submental triangle. [...]
In this article we will discuss about the extent and relations of cervical sympathetic trunk. Extent of Cervical Sympathetic Trunk: From base of skull to the neck of first rib. Preganglionic fibres arise from upper thoracic part of spinal cord - lateral horn cells (T1-T5). Relations of Cervical Sympathetic Trunk: Anterior: Carotid sheath with its content. Posterior: Prevertebral muscles and [...]