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About Dr. Joseph H Volker

Professor and Head, Department of Anatomy, Senior Lecturer & Consultant Surgeon, Professor-in-Charge, Medical Education Unit at St. Joseph's Hospital and Medical Center, Phoenix, Arizona.

Components of Operating System

By | 2018-04-20T09:26:59+00:00 April 20th, 2018|Computer Science|

The parts of an operating system all exist so as to make the various parts of a computer system work together. All user software program has to undergo the operating system in order to utilize any of the hardware, whether it be as basic as a mouse or keyboard or as complicated as an Internet [...]

Types of Operating System

By | 2018-04-19T10:38:43+00:00 April 19th, 2018|Computer Science|

There are Many Operating Systems which have the Ability to Perform the Requests those are received from the System. The Operating system can carry out a Single Operation and also Multiple Operations at a Time. So there are many kinds of Operating systems those are arranged by using their Working Techniques. Simple Batch System Multiprogramming [...]

Operating System

By | 2018-04-19T10:35:00+00:00 April 19th, 2018|Computer Science|

In basic terms Operating system is the primary program that handles all the software and hardware. It has control of every process, file, section of memory and device. It is essential if it functions as an intermediary ensuring both software and hardware communicate properly. Windows, Mac OS Linux and UNIX are the big operating system [...]

Zygomaticus Major and Minor

By | 2018-04-02T10:40:23+00:00 April 2nd, 2018|Anatomy, Head and Neck, Muscles|

The zygomaticus is a set of small muscles which travel via eye socket till the lips, beside the cheekbone. They attach with the zygomatic bone a.k.a. the cheekbone. The zygomaticus major directs the motion of upper lip outward and superiorly, and it especially controls smiling. It is activated when one frowns or shows sadness. The [...]

Procerus (Pyramidalis Nasi)

By | 2018-04-02T10:30:25+00:00 April 2nd, 2018|Anatomy, Head and Neck, Muscles|

The procerus a.k.a. Pyramidalis nasi is a small muscle which is found superficial towards the nasal bone and operates while a person frowns. In order to create transverse wrinkles superior to the bridge of the nose, the procerus pulls the medial margin of the eyebrows inferior. Procerus (Pyramidalis Nasi) Origin The procerus muscle [...]

Nasalis Muscle

By | 2018-04-02T10:19:39+00:00 April 2nd, 2018|Anatomy, Head and Neck, Muscles|

The nasalis is a muscle of the nose that contracts and dilates the nasal cartilages. It is made up of two parts, transverse/compressor and alar/dilator parts. It is structurally similar to a sphincter. Origin The muscle arises in the maxilla part of the skull and attaches within the nasal bone. The nasalis muscle is made [...]

Levator Labii Superioris

By | 2018-03-29T12:27:08+00:00 March 29th, 2018|Anatomy, Head and Neck, Muscles|

The levator labii superioris a.k.a. quadratus labii superioris is a muscle of facial expression. It is a wide muscular sheet; its origin spreads out via the side of the nose till the zygomatic bone. Levator Labii Superioris Origin The levator labii superioris muscle has three points of origin that blend and pass into [...]

Levator Labii Superioris Alaeque Nasi Muscle

By | 2018-03-29T12:27:48+00:00 March 29th, 2018|Anatomy, Head and Neck, Muscles|

Levator labii superioris alaeque nasi is a muscle of facial expression which expands the nostrils and raises the upper lip, therefore helping in making the "sneer" facial expression. Levator Labii Superioris Alaeque Nasi Muscle Origin The levator labii superioris alaeque nasi muscle arises via the frontal process of the maxilla. Insertion It separates [...]

Depressor Supercilli

By | 2018-03-29T12:28:22+00:00 March 29th, 2018|Anatomy, Head and Neck, Muscles|

The depressor supercilii muscle is a facial muscle which is located in the eye region. But, instead of being a separate muscle a lot of anatomical experts assume it to be a portion of the orbicularis oculi muscle. Origin The depressor supercilii arises: From the medial orbital rim. From the fascia covering the lower part [...]

Transverse Process

By | 2018-03-26T11:15:17+00:00 March 26th, 2018|Anatomy|

A transverse process is a bony protrusion which is located at the back of a vertebrae bone in the spine. There is one on both sides of every vertebra in the cervical, thoracic as well as lumbar spine. Structure Transverse processes of Cervical Vertebrae Transverse processes of Cervical Vertebrae The transverse processes are [...]