Tag: anatomy

Subclavius- Functional Anatomy

Subclavius Subclavius mostly assists in the protraction of the shoulder by depressing the clavicle. Origin -anterior costal cartilage of the first rib Insertion – medial inferior aspect of the clavicle Function – depresses the clavicleContinue reading

Pectoralis Minor – Functional Anatomy

Pectoralis Minor Pectoralis minor is a fan-shaped muscle in the front of the shoulder that secures the lateral angle of the scapula to the rib cage. Superficially, it is covered by the pectoralis major. Studies for breastContinue reading

Pectoralis Major – Functional Anatomy

Muscle Dissection studies show that pectoralis major varies dramatically. There is commonly 2-5 laminates, sometimes 6 or 7, and sometimes the entire pectoralis is missing (Poland Syndrome). Also, the overlap of sections varies among studies.Continue reading

Iliopsoas – Functional Anatomy

Iliopsoas Origin – vertebral bodies of T12-L4, transverse processes of L1-L5, Iliac fossa of the ilium Insertion – lesser trochanter of the femur Function – flexion of the hip, lateral flexion of the trunk WikipediaContinue reading

Psoas Major – Functional Anatomy

Psoas Major Origin – Psoas major usually originates from two sections. The anterior bellies originate from the bodies and intervertebral discs of T12-L4. The posterior portion originates from the transverse processes of L1-L5. Nerve roots fromContinue reading

Deltoid – Functional Anatomy

Deltoid   Deltoid is a triangular muscle that works closely with the rotator cuff muscles to lift the humeral shaft superiorly. It is also key in preventing dislocation of the humerus when lifting heavy loads. AllContinue reading

Infraspinatus – Functional Anatomy

Infraspinatus   Origin: infraspinous fossa Insertion: posterior greater tubercle of the humerus Function: stabilize the humeral head, externally rotate humerus   Wikipedia entry for infraspinatus. Tony Preston has a practice in Atlanta, Georgia where he sees clients. HeContinue reading