Term
| Superficial muscles of the neck |
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Definition
platysma
sternocleidomastoid |
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Term
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Definition
| fascia and skin over pectoralis major and deltoid muscles |
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Term
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Definition
| inferior border of mandible and skin over lower face |
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Term
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Definition
| cervical branch of the facial nerve 7 |
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Term
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Definition
tenses skin of neck
retracts and depresses the angle of the mouth |
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Term
| Sternocleidomastoid Origin (2) |
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Definition
upper part of the anterior surface of the manubrium sterni
medial third of the clavicle |
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Term
| Sternocleidomastoid Insertion |
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Definition
mastoid process of the temporal bone
superior nuchal line |
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Term
| Sternocleidomastoid Innervation |
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Definition
spinal part of the accessory nerve 11
ventral ramus of c2 |
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Term
| Sternocleidomastoid Function (2) |
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Definition
laterally bends head to same side
rotates head so face turns superiorly to opposite side |
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Term
| Which muscle divides the side of the neck into anterior and posterior triangles? |
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Definition
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Term
| What are the boundaries of the posterior triangle (5) |
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Definition
- Anteriorly - posterior border of the sternocleidomastoid
- Posteriorly - anterior border of trapezius
- Inferiorly - middle 1/3 of clavicle
- Roof - deep fascia, superficial fascia, platysma, skin
- Floor - splenius capitis, levator scapulae, scalenus medius, and scalenus posterior
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Term
| Scalenus Posterior Origin |
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Definition
| posterior tubercles of the transverse processes of the 4th, 5th, and 6th cervical vertebrae |
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Term
| Scalenus Posterior Insertion |
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Definition
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Term
| Scalenus Posterior Innervation |
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Definition
| ventral primary rami of c6-c8 |
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Term
| Scalenus Posterior Function (2) |
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Definition
raises the 2nd rib
flexes the cervical region of spinal column |
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Term
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Definition
| posterior tubercles of the transverse processes of all the cervical vertebrae |
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Term
Scalenus Medius Insertion
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Definition
| upper surface of the 1st rib |
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Term
Scalenus Medius Innervation
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Definition
| branches of the lower cervical spinal nerves |
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Term
Scalenus Medius Function (2)
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Definition
Raises 1st rib
flexes cervical region of spinal column |
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Term
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Definition
| anterior tubercles of the transverse processes of the 3rd, 4th, 5th, and 6th cervical vertebrae |
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Term
Scalenus Anterior Insertion
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Definition
| scalene tubercle on inner border of 1st rib |
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Term
Scalenus Anterior Innervation
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Definition
| branches of the lower cervical spinal nerves |
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Term
Scalenus Anterior Function
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Definition
| raises the 1st rib and rotates the rib |
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Term
| Which muscle divides the posterior triangle into a large occipital and a small supraclavicular triangle? |
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Definition
| inferior belly of the Omohyoid |
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Term
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Definition
inferior belly - upper border of scapula ending in a tendon under stern mastoid muscle
Superior belly - extends upward from this tendon |
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Term
| Omohyoid Muscle Insertion |
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Definition
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Term
| Omohyoid Muscle Innervation |
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Definition
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Term
| Nerves of the posterior triangle (7) |
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Definition
- accessory - divides the triangle into equal superior and inferior; supplies the sternocleidomastoid then passes postero-inferiorly to disappear deep to the trapeius
- lesser occipital - ascends along the posterior border of the sternocleidomastoid; divides to supply skin of neck and scalp
- great auricular - ascends on sternocleidomastoid; supplies skin of neck and behind ear
- transverse cervical - passes transversely across the sternocleidomastoid to supply skin over anterior triangle
- supraclavicular - single trunk which divices into medial intermediate, and lateral branches; supplies skin overanterior chest and shoulder
- phrenic - descends on scalenus anterior to enter the thorax
- brachial plexus - supraclavicular part in posterior triangle; lies anterior to the scalenus medius muscle
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