Wednesday 20 August 2014

Origin/Insertion of Muscles - Biceps, Brachialis and Brachioradialis

I wasn't original going to do the origin and insertion of these muscles now. However, I am putting it in here because I have a project to do for work. Which I will tell you about at a later date. It involves a video and I am a little anxious about it as I am still learning all this!!!!!!! But is there any other way to learn, other than getting in there and just DOING it!
 
Biceps Brachii, Brachialis and Brachioradialis
 
Biceps Brachii
Is a two headed muscles that crosses both the shoulder and elbow joints. It is one of 3 muscles that flex the forearm at the elbow.

Origin: Long Head: Supraglenoid tubercle of the scapula
            Short Head: Coracoid process of the scapula
Insertion: Radial tuberosity; bicipital aponeurosis to the fascia on the medial side of the forearm
Action: Flexes the forearm at the elbow; also flexes arm (weakly) at the shoulder

Supraglenoid Tubercle and Coracoid Process
 
Radial Tuberosity

Bicipital aponeurosis is "a flat sheet of connective tissue that fans out from the medial side of the tendon to blend with deep fascia covering the anterior compartment of the forearm". http://medical-dictionary.thefreedictionary.com/Lacertus+fibrosus

Brachialis
Origin: Anterior, distal half of humerus
Insertion: Coracoid process and tuberosity of ulna
Action: Flexes forearm at elbow

Anterior, distal half of humerus

Coracoid process of ulna

Brachioradialis
Origin: Lateral supracondylar ridge of humerus
Insertion: Styloid process of radius
Action: Flexes the arm at elbow

Lateral Supracondylar ridge
 
Styloid Process

1 comment:

  1. Thank you for making this available. I am currently in my CPT course with ACSM. It is tough!!

    This is a good resource! Grateful

    ReplyDelete