OT 5011 Week 2 Study Guide

The brachial plexus and subclavian artery pass through a small gap between which two muscles on the anterior, lateral neck?

Anterior and middle scalene

To discern the posterior scalene from the levator scapula, what action could you ask your partner to perform that would contract the levator but not the scalene?

Locate the posterior scalene and ask partner to SLOWLY ELEVATE SCAPULA.

The ____ is the strongest muscle in the body relative to its size.

Massester

Temporalis Origin- ? Insertion- ?

O- Temporal fossa and fascia I- Coronoid process and anterior edge of ramus of the mandible

Sternocleidomastoid (SCM) Origin- ? Insertion- ?

O- Top of manubrium, medial 1/3rd of the clavicle I- Mastoid process of temporal bone and the lateral portion of superior nuchal line of occiput

Middle scalene Origin- ? Insertion- ?

O- Transverse process of 2nd though 7th cervical vertabrae (posterior tubercles) I- First rib

Posterior scalene Origin- ? Insertion- ?

O- Transverse process of 6th and 7th cervical vertabrae (posterior tubercle) I- Second rib

Anterior Scalene Origin- ? Insertion- ?

O- Transverse processes of 3rd through 6th cervical vertabrae (anterior tubercles) I- First rib

Massester Origin- ? Insertion- ?

O- Zygomatic arch I- Angle and ramus of mandible

To access the insertion of the Temporalis, you must ask your partner to perform what action?

Open their mouth wide

Which scalene is difficult to distinguish from surrounding muscle bellies?

Posterior scalene

To create an even more visible contraction in the SCM, ask your partner to flex her neck after making what adjustment?

Rotating head to opposite side

The anterior scalene lies partially deep to the lateral edge of which muscle?

SCM

You might ask your partner to "breathe deeply into your upper chest" when palpating which muscle group?

SCM and trapezius

The two heads of the SCM originate at the ____ and the ____.

Sternum; clavicle

The broad origin of which muscle attaches to the front, temporal an parietal bones?

Temporalis

Which muscles are located between the SCM and the anterior flap of the trapezius?

The three scalenes 1) Anterior 2) Middle 3) Posterior