Session 1 - Part II Flashcards Preview

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Flashcards in Session 1 - Part II Deck (22):

What does the common carotid artery biforcate into?

Internal carotid
External carotid


What is the Thyrocervical trunk?

A branch of the subclavian artery. It splits into 4 vessels shortly after it originates


What does the Thyrocervical trunk divide into?

Inferior thyroid artery
Suprascapular artery
Ascending cervical artery
Transverse cervical artery


Does the internal carotid artery give branches?

No it goes straight to the brain


Does the external carotid artery give branches?

Yes, it supplies the head and neck


At what level does the common carotid biforcate?

The superior border of the thyroid cartilage (Approx C4)


What is a common site for atheroma in the neck?

The common carotid artery causing stenosis. If it ruptures it can cause an embolism leading to a TIA/Stroke


What are the contents of the carotid sheath?

Common carotid artery
Internal jugular vein
Vagus nerve
Some cervical lymph nodes


Where can the carotid pulse be felt?

In the Carotid triangle


Where can the carotid massage be performed?

In the Carotid triangle


What is the clinical use of the Carotid triangle?

Surgical access to arteries, Internal jugular vein, Hypoglossal and vagus nerve
Carotid pulse can be felt
Carotid massage can be performed


Name a branche of the Internal carotid?

Opthalmic artery


What does the Opthalmic artery branch into?

The Supraorbital artery
The Supratrochlear artery


How many branches does the External carotid artery give off?

6 branches in the head and 2 terminal branches
Supply the scalp


Why does the scalp bleed badly when lacerations occur?

The arteries have limited constriction
Many anastomoses
If the laceration is through the epicranial aponeurosis the muscles pull the cut apart more


What is the venous drainage of the scalp?

Supraoribital vein and supratrochlear vein unite at the medial angle of the eye to become the Angular vein. This then drains into the facial vein


What is unique about the veins in the scalp?

The are valveless
*Means infection can spread to the cranial cavity from the scalp and then affect the meninges*


What are Dural venous sinuses?

Venous channels found between layers of dura mater in the brain.


What are the arteries supplying the Dura and skull?

Maxillary artery gives off middle meningeal artery which then biforcates into anterior and posterior


What is the Pterion?

Where the 4 bones of the skull meet


What is the clinical significance of the Pterion?

Weak point of the skull so a blow to the head here would damage the middle meningeal artery
*Causes extradural haemorrhage which would pull the dura away*


Where does the cerebral veins drain into?

The dural venous sinuses