Bony Skull, Scalp, Face & Radiology, Neck muscles and Thyroid Gland Flashcards
What is the most common type of joint seen between bones in the skull?
Fibrous
Which part of the skull contains red marrow?
Diploe
Between which 2 bones does the sagittal suture lie?
Between both parietal bones
Between which 2 bones does the coronal suture lie?
Frontal & parietal
Between which two bones does the lamboid suture lie?
Occipital & parietal
The mastoid process is part of which bone?
Temporal
The zygomatic arch is formed out of which 2 bones?
Temporal & zygomatic
The styloid process is part of which bone?
Temporal
What is the largest foramine of the posterior cranial fossa?
Foramen Magnum?
Name 2 structures that pass through the foramen magnum:
Brain stem
Right & left vertebral arteries
What type of joint is the zygomatic arch formed from?
Fibrous
What makes up the layers of the scalp?
S - Skin
C - Connective tissue (dense)
A - Aponeurosis of occipitofrontalis muscle
L - Loose alveolar connective tissue
P - Periosteum
Which nerves innervate the anterior portion of the scalp?
All 3 branches of the Trigeminal nerve
What is the nerve supply for the posterior portion of the scalp?
Spinal nerves C2/3
What structure forms the ventral rami of C5-T1
Brachial plexus, supplying the chest, shoulder, arms and hands
A rash developing over the forehead and upper eyelid would indicate a dermatome innervated by which nerve?
Opthalmic branch (V1) of Trigeminal nerve
In which layer of the scalp are blood vessels located?
Connective tissue (dense)
Would a lacertaing wound to the scalp cause profuse or light bleeding? Why?
Profuse - the dense connective tissue gets retracted and is unable to vasoconstrict, leading to profuse bleeding
Which arteries of the scalp are branches of the ICA and ECA?
Occipital artery - ECA
Posterior auricular artery - ECA
Superficial temporal artery - ECA
Supratrochlear artery - ICA
Supra-orbital artery - ICA
What is diploe?
A spongy cancellous bone seperating inner and outer layers of the cortical bone of the skull
Where do the muscle of facial expression attach?
Directly to the skin
From which foramen does the Facial nerve emerge onto the side of the face?
Stylomastoid foramen
Which 2 bony processes for the stylomastoid foramen?
Styloid process
Mastoid process
Through which gland does the facial nerve pass?
The parotid gland
What are the 3 salivary glands?
Parotid
Submandibular
Sublingual
What type of gland is the parotid gland?
Exocrine
How do exocrine differ to endocrine glands?
Exocrine - secretes onto epithelial surface via a duct
Endocrine - secretes directly into bloodstream
Whic nerve branches emerge from the anterior border of the parotid gland?
Buccal branches
Which muscle does the parotid duct pierce on its way to the oral cavity?
Buccinator
Opposite from which upper tooth does the parotid duct open?
2nd upper molar tooth
Which structures pass through the parotid gland?
Facial nerve
Posterior auricular artery
Retromandibular vein
What is the innervation of the parotid gland?
Sympathetic and Parasympathetic innervation
Which cranial nerve carries parasympathetic fibres destined for the parotid gland?
Mandibular branch (V3) of the Trigeminal nerve
Where does the sympathetic innervation to the parotid gland originate from?
Superior cervical ganglion
What are the facial artery and superficial temporal artery branches of?
External carotid artery
What bone does the facial artery wind around to reach the face?
Mandible
What facial muscle lies immediately posterior to the facial artery as it enters onto the face?
Masseter
Which gland does the facial artery groove against before it enters the face?
Parotid
Where does the facial artery end?
Medial corner of the eye
Which major vein do the facial and superficial temporal veins drain into?
IJV
What are the 4 compartments of the neck?
1) Vertebral compartment (cervical vertebrae)
2) Vascular compartment (Vagus nerve)
3) Visceral compartment (Thyroid gland)
4) Musculofascial collar
How many cervical vertebrae are there?
7
What kidn of joint is present between the occipital condyles and C1 (Atlas)?
Condyloid type of synovial joint
What type of joint is present between C1/C2 the Odontoid peg?
Pivot type of synovial joint
What structures pass through the foramen transversarium?
Vertebral artery + vein and sympathetic nerves
What is the vertebra prominens?
C7
What is the special features of the cervical vertebrae spines?
Bifid and short
What is the curvature called that exists in the cervical portion of the spinal column?
Lordotic curve
What are the borders and contents of the anterior triangle?
Superior - Lower border of the mandible
Medially - Imaginary sagittal line
Laterally - Medial border of SCM
Contents - CCA, IJV, Facial & Vagus nerve
What are the borders and contents of the posterior neck triangle?
Medially - Posterior border of SCM
Laterally - Anterior border of Trapezius
Inferiorly - Middle 1/3 of clavicle
Contents - EJV, Omohyoid, subclavian artery
What are the distal and proximal attachments of the SCM muscle?
Distal - Mastoid process
Proximal - Clavicle + sternum,
If the left SCM contracted, to which side would the face turn and the head tilt?
Face turn - Right
Head tilt - Left
What are the actions of the trapezius?
Rotates scapula
Which cranial nerve innervates the scapula and in which triangle of the neck can it be found?
The accessory nerve - posterior triangle
What 4 triangle make up the anterior triangle of the neck?
1) Submental
2) Submandibular
3) Carotid
4) Muscular
What are the contents of each of the 4 triangles of the anterior neck triangle?
Submental - Lymph nodes
Submandibular - Facial artery and submandibular salivary gland
Carotid - Neurovascular sheath (CCA, IJV, Hypoglossal + Vagus)
Muscular - Infrahyoid muscle
Which artery is the CCA a branch of on the right and left hand side?
Right side - Brachiocephalic artery
Left side - Aorta
At what vertebral level does the CCA bifurcate into ECA and ICA?
C4 - Thyroid cartilage
Does the ECA or ICA give off branches in the neck?
ECA
Is the ICA or ECA more lateral?
ICA
What are the 2 terminal branches of the ECA and in which structure are they given off?
Superficial temporal artery
Maxillary artery
Both arise from the parotid gland
Through which skull opening does the IJV pass?
Jugular foramen
Which vein does the IJV join with and what is the name of the vein that is formed?
IJV joins with subclavian vein to form the brachiocephalic vein
Which structures does the EJV drain?
Face and scalp
In relation to the SCM, how does the EJV run? Superficial or deep?
Superficial to the SCM
Which vein does the EJV drain into?
Subclavian
Which muscles/set of muscles are attached to the hyoid bone?
- Suprahyoid muscles
- Infrahyoid muscles
- Hypoglossus + genioglossus
- Middle pharyngeal constrictor
What are the muscles of the suprahyoid group and what is their nerve supply?
Mylohyoid - Mandibular branch of Trigeminal nerve
Geniohyoid - C1 nerve roots
Digastric:
Anterior belly - Mandibular branch of Trigeminal nerve
Posterior belly - Facial nerve
Stylohyoid - Facial nerve
What are the actions of these muscles?
Pulls Hyoid Bone upwards:
Stylohyoid
Mylohyoid
Digastric
Lowers Mandible:
Digastric
What muscles make up the infrahyoid group and what is their innervation?
Sternothyroid - C1-C3
Sternohyoid - C1-C3
Thyrhyoid - Anterior ramus of C1
Omohyoid - C1-C3
What actions would these muscles have on the hyoid bone?
Sternothryoid - Depresses thyroid cartialge
Sternohyoid - Depresses hyoid bone
Omohyoid - Depresses hyoid bone
Thyrohyoid - Depresses the hyoid bone
What are the vertebral root values of the cervical plexus?
C1-C4
From between which 2 muscles does the cervical plexus emerge?
SCM and Trapezius
What is a motor nerve that emerges from this plexus and travels down into the thorax?
Phrenic nerve
What are the 2 parts of the Thyroid gland?
Isthmus and 2 lobes
At what vertebral level does the isthmus lie in relation to the trachea/larynx?
Lies in front of the cricoid cartilage and covers the 2nd and 3rd tracheal rings
C6-7
In which compartment of the neck does the Thyroid gland reside?
The visceral compartment