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OCT 720: Week 4: Head & Torso Part III
Jul 31, 2024
Lecture Notes: Neck Muscles
Sternocleidomastoid (SCM)
Description
: Largest muscle around the neck, present in pairs.
Function
:
Bilaterally: Extends the head at the cervical spine (C-spine).
Unilaterally: Turns the head to the opposite side of the muscle contracting.
Example
: If a person turns their head to the right, the left SCM contracts.
Deep Cervical Flexors
Longus Colli
:
Function
: Works with SCM to prevent hyperextension of the neck, holds the head in position.
Movement
: Tucks the chin (retraction of the neck).
Importance
: Critical for children with cerebral palsy who may struggle with swallowing and maintaining a stable head position.
Neck Extensors
Muscles
: Spinalis Capitis, Splenius Cervicis
Function
:
Bilaterally: Extends the neck.
Unilaterally: Rotates or bends the neck to the same side.
Key Points
Coordination of different neck muscles is crucial for head movements and stability.
Issues with these muscles can lead to significant challenges, especially in individuals with certain conditions like cerebral palsy.
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Full transcript
Lecture Notes: Neck Muscles
Sternocleidomastoid (SCM)
Description
: Largest muscle around the neck, present in pairs.
Function
:
Bilaterally: Extends the head at the cervical spine (C-spine).
Unilaterally: Turns the head to the opposite side of the muscle contracting.
Example
: If a person turns their head to the right, the left SCM contracts.
Deep Cervical Flexors
Longus Colli
:
Function
: Works with SCM to prevent hyperextension of the neck, holds the head in position.
Movement
: Tucks the chin (retraction of the neck).
Importance
: Critical for children with cerebral palsy who may struggle with swallowing and maintaining a stable head position.
Neck Extensors
Muscles
: Spinalis Capitis, Splenius Cervicis
Function
:
Bilaterally: Extends the neck.
Unilaterally: Rotates or bends the neck to the same side.
Key Points
Coordination of different neck muscles is crucial for head movements and stability.
Issues with these muscles can lead to significant challenges, especially in individuals with certain conditions like cerebral palsy.