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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.

Submandibular Fossa

By | 2018-02-22T11:24:59+00:00 February 22nd, 2018|Anatomy, Areas, Head|

The submandibular fossa a.k.a. the mandibular fossa or submaxillary fossa is structurally a concave, recessed area of bone. The submandibular fossa is found among the body of the mandible and both bellies of the digastric muscle. The mylohyoid, hyoglossus, and styloglossus muscles create the medial wall of the fossa. Submandibular Fossa The submandibular [...]

Stylohyoid Ligament

By | 2018-02-22T11:18:12+00:00 February 22nd, 2018|Anatomy, Head, Joints|

Styloid process radiologically seems as a long, tapering, thin radiopaque prominence, which is thicker at its base and protrudes down as well as forward. Lengthwise, it differs generally from approximately 0.5-2.5 cm. From the styloid process the stylohyoid ligament spreads out towards the lesser horn of the hyoid bone. Origin The stylohyoid ligament has its [...]

Mylohyoid Line

By | 2018-02-22T10:44:50+00:00 February 22nd, 2018|Anatomy|

Mylohyoid line is a protuberant oblique rim which goes obliquely downwards and forwards from the back of the 3rd molar tooth which is approximately 1 cm inferior towards the alveolar margin, towards the symphysis menti inferior towards the genial tubercles. Mylohyoid Line Relations Mylohyoid groove is located beneath the posterior end of the [...]

Mylohyoid Muscle – Mylohyoideus Muscle

By | 2018-02-22T10:43:51+00:00 February 22nd, 2018|Anatomy, Head, Muscles|

Mylohyoid or Mylohyoideus muscle is located deep towards the anterior belly of the digastric muscle and it is a plane, triangle-shaped muscle. In order to form the canal-like floor of the mouth, the right and left mylohyoid muscles connect in the median fibrous raphe. The floor of the mouth is also known as diaphragma oris [...]

Mylohyoid Groove/Mylohyoid Fossa

By | 2018-02-22T09:59:17+00:00 February 22nd, 2018|Anatomy, Areas, Head|

Mylohyoid groove originates just inferior to the mandibular foramen and in order to connect with the body of mandible inferiorly towards the posterior portion of mylohyoid line, it travels inferiorly and anteriorly. The medial surface of the ramus of the mandible is irregular, which is meant for connection of the medial pterygoid muscle posteroinferiorly towards [...]

Maxillary Tuberosity/Tuberosity of Maxilla

By | 2018-02-22T08:55:39+00:00 February 22nd, 2018|Anatomy, Areas, Head|

A protrusion of bone known as the maxillary tuberosity is the most posterior portion of the maxillary alveolar process. Maxillary Tuberosity A notch called the hamular notch distinguishes the maxillary tuberosity of each maxilla from the neighboring pterygoid process of the sphenoid bone. On its lateral side, maxillary tuberosity is irregular for attaching [...]

Atlas C1

By | 2018-02-22T08:57:00+00:00 February 22nd, 2018|Anatomy, Back, Bones|

The atlas a.k.a. C1 is the first vertebra of the spinal column. It connects with the occipital bone, which, is a flat bone located at the posterior part of the head. Atlas C1 Structure The atlas is made up of: Anterior arch Posterior arch Paired lateral masses Paired transverse processes It [...]

Iliopectineal Line

By | 2018-02-22T08:46:27+00:00 February 21st, 2018|Anatomy, Pelvis|

The iliopubic eminence possesses a margin known as the iliopectineal line. Iliopectineal line is created by combination of arcuate line from the ilium and pectineal line from the pubis. Inferiorly, the Iliopectineal line is divides the pelvis superiorly into the pelvis major or false pelvis and the pelvis minor or true pelvis. It creates the [...]

Lymph Nodes of Pelvis

By | 2018-02-21T11:59:28+00:00 February 21st, 2018|Anatomy, Pelvis|

Lymph from pelvic organs returns via the lymphatic vessels and nodes of the pelvis. The size, location and number of various groups and sub-groups of lymph nodes in the pelvic region are different in different individuals. Functions They are accountable for the elimination of interstitial fluid from tissues. They carry white blood cells towards and [...]

Suprapleural Membrane (Sibson’s fascia)

By | 2018-02-22T08:47:45+00:00 February 21st, 2018|Anatomy, Thorax|

The suprapleural membrane, also known as Sibson fascia is a strong fascial connective tissue layer above the superior thoracic inlet on each side, placed on top of the tips of the lungs. Suprapleural Membrane It can be said to be an extension of the tendinous attachment of the scalenus minimus muscle. It slopes [...]