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.. DD ANATOMIC SCIENCES .. > Muscle > Flashcards

Muscle Flashcards

1
Q

Which of the following triangles is bounded by the sternocleidomastoid, the posterior belly of diagastric and superior belly of omohyoid muscle?

A

Carotid triangle

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2
Q

Contents of the submental triangle

A

Sumbental lymph nodes and floor of the mouth

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3
Q

What muscles assist in opening the pharyngeal orifice of the auditory tube during swallowing?

A

Salpingopharyngeal

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4
Q

Origin of stylopharyngeus muscle

A

Styloid process of temporal bone

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5
Q

Pharynx

External circular layer includes:

A

Superior
Middle
Inferior pharyngeal contrictors

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6
Q

Internal longitudinal layer:

A

Palatopharyngeus
Stylopharyngeus
Salpingopharyngeus

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7
Q

All longitudinal muscles of the pharynx are innervated by______ except _____.

A

Vagus nerve via pharyngeal plexus

Stylopharyngeus muscle which is innervated by glossopharyngeal nerve (CN IX)

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8
Q

Which of the following contains thick myosin filaments only?

A

H zone

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9
Q

Functional unit of the skeletal muscle

A

Sarcomere

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10
Q

The _____ is the most superficially located and the most strongest muscle of mastication.

A

Masseter

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11
Q

All muscles of mastication are innervated by the

A

Mandible division of trigeminal nerve (CN V3)

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12
Q

The anterior and superior pillars of the fauces enclose which area of lymphoid tissue?

A

Palatine tonsils

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13
Q

The anterior and posterior pillars of the fauces enclose which area of lymphoid tissue?

A

Palatine tonsils

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14
Q

Neurovascular bundle of the soft palate

A

Lesser palatine vein, artery and nerve

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15
Q

A narrow passage from the mouth to the pharynx, situated between the soft palate and the base of the tongue

A

Fauces

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16
Q

Results from failure of complete fusion of the palatine shelves

A

Bifid uvula

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17
Q

These following muscles are innervated by the same nerve that innervated the muscles of mastication

A

Mylohyoid
Tensor tympani
Tensor veli palatini
Ant. Belly of the digastric

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18
Q

All of the muscles of mastication are innervated by the

A

Mandibular division of trigeminal nerve

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19
Q

All muscles of mastication receive blood from the

A

Pterygoid portion of the maxillary artery

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20
Q

All muscles of mastication are derived from

A

1st pharyngeal arch

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21
Q

Muscles of the tongue are innervated by what nerve?

A

Hyoglossus
Styloglossus
Genioglossus

❌ palatoglossus

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22
Q

Palatoglossus muscle is innervated by

A

Hypoglossal nerve
Pharyngeal plexus via vagus nerve

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23
Q

Provides sensory input to the anterior 2/3 of the tongue

A

Trigeminal nerve

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24
Q

Provides/ supplies the posterior 1/3 of the tongue

A

Glossopharyngeal nerve

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25
Q

Muscles of the tongue are derived from

A

Myoblasts that migrate from myotomes of occipital somites

26
Q

Connective tissue, lymphatics and blood vessels of the tongue are derived from

A

Pharyngeal arch mesenchyme

27
Q

These muscles are responsible for elevating the mandible

A

Masseter
Medial pterygoid
Temporalis

❌ mylohyoid

28
Q

Five paired skeletal muscles of the soft palate

A

Palatoglossus
Palatopharyngeus
Levator veli palatini
Tensor veli palatini
Uvular

29
Q

All paired skeletal muscles of the soft palate are innervated by pharyngeal plexus except

A

Tensor veli palatini - a branch of nerve to the medial pterygoid

30
Q

Diaphragm is innervated by

A

Phrenic nerve

  • travels thru the thorax between the pericardium and pleura
31
Q

What costal muscle can typically cross more than one intercostal space?

A

Subcostal

32
Q

These muscles raise the ribs during inspiration

A

External intercostal muscles - runs PI

Subcostal muscles

33
Q

These muscles depress the ribs during expiration (run posteriorly and inferiorly)

A

Internal intercostal muscles

34
Q

These muscles pull through ribs downward during expiration

A

Transverse thoracic muscles

35
Q

Name the molecule that lies along the surface of F-actin and physically covers myosin binding sites during the resting state

A

Tropomyosin

36
Q

The right and left rectus abdominis muscles are entirely independent, being separated by a connective structure called the:

A

Linea alba

37
Q

Posterior abdominal muscles include:

A

Psoas major and minor (inn. by lumbar plex)
Quadratus lumborum (lumbar plex)
Iliacus (femoral nerve)

38
Q

The connective tissue layer surrounding each individual muscle fiber is called

A

Endomysium

39
Q

Elongated and spindle shaped with single nucleus; they are responsible for involuntary movements of internal organs (e.g peristalsis )

A

Smooth muscle

40
Q

Attaches to the skeleton and is responsible for voluntary body movement. Consists of many elongated, cylindrical cells which are multinucleated.

A

Skeletal muscle

41
Q

Damage to this nerve results in hoarseness and difficulty breathing

A

Recurrent laryngeal nerve (located inferior to inferior of pharyngeal constrictor)

42
Q

Supplies all intrinsic muscles except the cricothyroid

A

Recurrent pharyngeal nerve

43
Q

Cricothyroid muscle is supplied by

A

External branch of superior laryngeal nerve

44
Q

Plays an important role in cough reflex, which keeps the inferior of the larynx free of the foreign material

A

Internal laryngeal nerve

45
Q

Contents of the axilla

A

Axilliary lymph nodes
Axillary artery
Axillary vein
Axillary sheath
Cords of brachial plexus

46
Q

These infrahyoid muscles are innervated by the ansa cervicalis

A

Sternohyoid
Sternothyroid
Omohyoid

47
Q

Thyrohyoid is innervated by

A

C1 via hypoglossal nerve

48
Q

Suprahyoid muscles

A

Digastric (posterior and anterior belly)
Geniohyoid
Mylohyoid
Stylohyoid

49
Q

Major muscle for mouth opening

A

Anterior belly of the digastric

50
Q

Infrahyoid muscles and their general function

A

Sternohyoid
Sternothyroid
Thyrothyroid
Omohyoid

DEPRESS HYOID

51
Q

Most commonly injured in a mid-humeral shaft fracture

A

Radial nerve

52
Q

Papillae

⚫️Most numerous arranged in v shaped rows
⚫️ absence of taste buds
⚫️ increased keratinization

A

Filiform

53
Q

Papillae

⚫️mushroom shaped projections found on the top of the tongue

A

Fungiform

54
Q

Papillae

⚫️ largest but fewest
⚫️arranged in v shaped rows at the back of the tongue
⚫️innervation?

A

Circumvallate (vallate)

Glossopharyngeal nerve (IX)

55
Q

Tongue papillae associated with ducts of Von Ebner’s glands

A

Circumvallate

56
Q

Papillae

⚫️ found on lateral margins as 3-4 vertical folds
⚫️ innervated by facial and glossopharyngeal nerves

A

Foliate

57
Q

Plummer Vinson syndrome triad

A

Dysphagia
Esophageal webs
Iron deficiency anemia

58
Q

The major regulatory proteins in muscle tissue are (2)

A

Troponin
Tropomyosin

59
Q

It is responsible for the skeletal muscle regeneration

A

Satellite cell

60
Q

What muscle elevates and abducts the eyeball?

A

Inferior oblique

.. DD ANATOMIC SCIENCES .. (15 decks)

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