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Erb's point
Midline SCM at posterior border is where 4 cutaneous nerves exit
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Cutaneous nerves
- Lesser occipital
- Greater auricular
- Transverse cervical
- Supraclavicular
- Phrenic
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Motor nerves
- n. to geniohyoid
- n. to Thyrohyoid
- ansa cervicalis
- nn. to sternohyoid, sternothyroids, omnohyoid,
- phrenic
- n. the trapezius
- n. to lower scapulae
- n. to SCM
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Lesser occipital
- o Spinal segment: C2
- o Impairment: Skin on scalp posterior to ear (posterior lateral)
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Great auricular n
- o C2,3
- o Skin surrounding the ear (behind and little bit anterior)
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Transverse cervical
- o C2,C3
- o Area of skin under the skin
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Supraclavicular n
- o C3,4
- o Lateral neck and superior shoulder girdle
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Phrenic nerve
- • Innervates diaphragm
- • Located anterior to anterior scalene
- • Connects brachial and cervical plexuses
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TMJ disc Posteriorly
- Attached by laminae to condyle and to the temporal bone
- Stable since attaches to bone
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TMJ disc anteriorly
Laminae attaches at Articular capsule an lateral pterygoid, articular eminence
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Temporal
- Go over zygomatic arch
- Innervate muscles that move the ear and a little bit of the frontalis muscle, outer part of obularis oculi
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**Zygomatic
- Runs over zygomatic arch
- Innervates obularis oculi
- Can forcefully close eye but not blink
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**Buccal
- Innervates bucinator
- Obularis oris (lips)
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Marginal mandibular
- -----Goes to mandible
- --Cervical
- -----Innervates platisma
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