General Organisation of the Head and Neck Flashcards

1
Q

What is the surface anatomy of the neck?

A

Thyroid cartilage

cricoid cartilage

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2
Q

What groups can the facial muscles be described as?

A

Muscles of facial expression =

  • orbicularis oculi
  • orbicularia oris
  • buccinator
  • platysma
  • frontalis

Muscles of mastication =

  • masseter
  • temporalis
  • medial pterygoid
  • lateral pterygoid
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3
Q

Outline the platysma muscles

A

Origin = pect major, deltoid

Insertion = muscles of the face

Action = depress corners of the mouth, assist in depression of the jaw (test = tighten jaw)

Innervation = facial N (cranial nerve)

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4
Q

Discuss the sternocleidomastoid

A

Origin = sternum, clavicle

Inserts = mastoid process

Action = lateral neck flexion, tilting chin to contralateral side. Both contraction = movement at the atlanto-occipital joint, and flexion for the neck (test = hand on pt neck and turn to look over shoulder)

Innervation = accessory N

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5
Q

Discuss the trapezius

A

Origin = superior nuceal line, external occipital protrubance, spinal process T spine

Insertion = spine of scapular, lateral 3rd of clavicle, acromion

Action = elevation of shoulders (test = shrug against resistance)

Innervation = accessory N

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6
Q

What is torticollis?

A

Distonic condition defined by asymmetrical head position

Distonic = abnormally contracting of its own accord

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7
Q

What are the triangles of the neck?

A

Anterior triangle

posterior triangle

carotid

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8
Q

What are the borders of the anterior triangle?

A

Anterior margin of SCM

Inferior margin of mandible

Midline of neck

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9
Q

What are the borders of the posterior triangle?

A

Anterior margin of trapezius

Clavicle

Posterior margin of SCM

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10
Q

What is the hyoid bone?

A

U shaped bone of the anterior neck

Base of the mandible (C3)

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11
Q

Discuss the omohyoid

A

Infra-hyoid

Runs behind SCM

Runs through posterior triangle

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12
Q

Discuss the digastric

A

Supra-hyoid

2 muscular bellies

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13
Q

What are the borders of the carotid triangle?

A

Lat = Medial border of SCM

Inf = Superior belly of Omohyoid

Sup = Posterior belly of the Digastric

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14
Q

What is the contents of the carotid triangle?

A

Common carotid artery which within bifurcates to external and internal carotid arteries

Internal jugular vein

Hypoglossal N, Vagus N

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15
Q

What tissue type of the superficial cervical fascia?

A

Loose CT

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16
Q

What tissue type of the deep cervical facia?

A

Dense CT

17
Q

What is the contents of the superficial cervical fascia?

A

Includes fat, platysma, cutaneous nerves, lymph nodes and superficial blood vessels

18
Q

What are the layers of the deep cervical fascia?

A

Investing layer

Carotid sheath

Pre tracheal fascia

Pre vertebral fascia

19
Q

Label this cross section of the neck

A
20
Q

What is the retropharyngeal space?

A

A space between the pretrachel and prevertebral fascial layers

21
Q

What is mediastinitus?

A

Inflam of tissues in the mediastinum

Can be caused by infections in the retropharyngeal and pre tracheal space extending inferiorly

22
Q

What is the nerve of facial expression?

A

Facial N (VII CN)

23
Q

What is the nerve of mastication?

A

Trigeminal (CN V)

24
Q

What is the main sensory N of the face?

A

Trigeminal N (V CN)

25
Q

What are the 3 branches of the trigeminal N?

A

Va – ophthalmic division

Vb – maxillary division

Vc – mandibular division

26
Q

What are the 5 key extra-cranial branches of the facial N?

A

To Zanzibar By Motor Car

Temporal

Zygomatic

Buckle

Mandibular

Cervical

27
Q

Outline the major arteries and veins of the head and neck

A

Common carotid artery = internal and external carotid artery

Internal jugular vein (IJV) – receives drainage from the facial vein

External jugular vein – receives drainage from the scalp and face

28
Q

Describe the layers of the scalp

A

SCALP

Skin = hair follicles and sebaceous glands

Dense connective tissue = richly vascularised

Epicranial aponeurosis = connects occipitalis and frontalis muscle

Loose areolar connective tissue = thin

Periosteum = outer layer of skull bones

29
Q

What is the danger area of the scalp and why?

A

Loose connective tissue

Pus and blood can spread easily within it = pass to cranial cavity via emissary veins = spread from scalp to meninges = meningitis

30
Q

Outline the blood supply of the scalp

A

Via the external carotid artery and ophthalmic artery (branch of internal carotid)

Superficial temporal = supplies the frontal and temporal regions

Posterior auricular = supplies area superiorly and posteriorly to the auricle

Occipital = supplies back of scalp

31
Q

What is the nervous innervation of the scalp

A

Trigeminal N

Cervical Ns

32
Q

The investing layer of deep cervical fascia splits to enclose which structures?

A

Sternocleidomastoid

Submandibular gland

Trapezius

Parotid gland

33
Q

A retropharyngeal abscess is suspected. What complications could occur due to extension of the infection from this deep neck space?

A

Difficulty breathing due to tracheal compression

Extension of infection into the mediastinum

Painful or difficulty swallowing due to oesphageal compression

34
Q

Where does caratid shealth connect to?

A

inferiorly fuses with the pericardial sac

superiorly attaches to the base of the skull