What are the 6 Branches of the Facial Nerve (VII)?
What are the 6 groups of Muscles of Facial Expression?
What is/are the Muscles of Facial Expression of the Scalp?
Occipitofrontalis, Frontal and Occipital Belly
What is/are the Muscles of Facial Expression of the Orbital Group and their actions?
Obicularis Occuli – Orbital: forcefully closes
Palpebral – Gently closes
Lacrimal – draws lacrimal puncta laterally
Corrugator Supercilli- furrows brow
What is/are the Muscles of Facial Expression of the Nasal Group and their actions?
Nasalis Transverse – compress nares
Nasalis Alar – widens nares
Depressor Septi Nasi – widens nares
What is/are the Muscles of Facial Expression of the Neck and their actions?
Platysma: tenses skin, moves labia inferiorly
What is/are the Muscles of Facial Expression of the Auricular Group and their
Anterior Auricular – Up and forward
Superior Auricular – Elevates ear
Posterior Auricular – Retracts and elevates
What is/are the Muscles of Facial Expression of the main Oral and their actions?
Orbicularis Oris – purses lips
Buccinator – Expells air from cheeks
What is/are the Muscles of Facial Expression of the Lower Oral Group and their
Depressor Anguli Oris – depress corner of mouth
Depressor Labii Inferioris – depress corner of mouth laterally
Mentalis – Positions lips
What is/are the Muscles of Facial Expression of the Upper Oral Group and their
Risorious – grin
Zygomaticus Major – elevates corner of mouth
Zygomaticus Minor – elevates upper lip
Levator Anguli Oris – Levetates angle of mouth
How many Oral Group muscles are there?
What are the 3 Compartments of the Neck and what do they surround?
Visceral – Trachea, Eosophagus, Thyroid
Vascular – Int. Jugular, Nerves, Carotid Artery
Vertebral – Muscles, Vertebral Column
What are the 5 Fascias of the Neck?
What is the Danger Space and why is it considered so?
The Retropharyngeal space as
- mandibular infection can spread to submental or submandibular spaces, then to
- Infection here can cause oedema of the larynx
- Infection can then spread to mediosternum and infect cardiac and respiratory
What are the Muscles of Neck and what are their regions and actions?
Sternocleidomastoid – draw head forward, tilt and rotate – forms border of Anterior triangle
Trapezius – rotation of scapula – forms posterior triangle
What are the Anterior Group of Suprahyoid Muscles and their innervations?
Digastric – V3
Mylohyoid – V3
Geniohyoid – C1 (cervical spinal nerve)
What are the Posterior Group of Suprahyoid Muscles and their innervations?
Posterior Digastric – VII (Facial)
Stylohyoid – VII
What are the 4 Infrahyoid muscles and their O/I?
Sternohyoid O – Sternum I- Hyoid
Sternothyroid O- Sternum I- Thyroid Cartilage
Thyrohyoid O – continuation of Sternothyroid I - Hyoid
Omohyoid Lateral and Posterior Belly – Scapula, around Jugular, to tendon, to hyoid
Why do cuts to the head bleed so profusely?
The blood supply to the scalp is a high volume as the brain requires a large amount of blood to function. This blood travels through veins and arteries high in astemosis and pass under skin with very little intervening dermis and hypodermis meaning a small cut can bleed profusely.
What are the 6 types of Bone forming the neurocranium?
What are the 8 types of Bone forming the Viscerocranium?
Inf. Nasal Concha x2
What are the 4 sutures of the skull?
Coronal (frontal and Parietal)
Squamosal (Temporal, parietal, sphenoid)
Lambdoidal (Occipital, Parietal)
What 7 Bones form the Orbit?
The four surfaces and some features of the maxilla are:
Nasal – lateral wall of nasal cavity
Facial – inferior orbital margin, zygomatic process, frontal process, alveolar process
Orbital – floor of orbit
Infratemporal – floor of infratemporal fossa
The Zygomatic bone processes and surfaces are:
Temporal process, frontal process, Malar and Temporal Surfaces, Zygomatic foramen
The Suture of the maxilla is called the…
The Mandible articulates with…
The temporal bone and maxillae (through teeth)
Injections are given through the what raphe at what depth?
Through the coronoid notch to the pterygomandibular raphe at 2 to 4cm deep