Teres Minor: Difference between revisions
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== Description == | == Description == | ||
Teres Minor is a narrow muscle which lies below [[Infraspinatus|infraspinatus]], above teres major and triceps brachii, and deep to [[Deltoid|deltoid]]. | Teres Minor is a narrow muscle which lies below [[Infraspinatus|infraspinatus]], above teres major and triceps brachii, and deep to [[Deltoid|deltoid]]. It is one of the four muscles which comprise the [[Rotator Cuff|Rotator Cuff]]. [[Image:Teres minor muscle.png|border|right|250px]] | ||
It is one of the four muscles which comprise the [[Rotator Cuff|Rotator Cuff]]. [[Image:Teres minor muscle.png|border|right|250px]] | |||
== Origin == | == Origin == | ||
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== Insertion == | == Insertion == | ||
The upper fibres end in a tendon which inserts into the inferior facet of the greater tubercle of the humerus. | The upper fibres end in a tendon which inserts into the inferior facet of the greater tubercle of the humerus. The lower fibres insert into the humerus directly below the inferior facet of the greater tubercle of the humerus.<ref name="grays" /> | ||
The lower fibres insert into the humerus directly below the inferior facet of the greater tubercle of the humerus.<ref name="grays" /> | |||
== Nerve Supply == | == Nerve Supply == | ||
The axillary nerve (roots C5, C6) from the posterior cord of the [[Brachial plexus|brachial plexus]].< | The axillary nerve (roots C5, C6) from the posterior cord of the [[Brachial plexus|brachial plexus]].<refname="aex">http://www.anatomyexpert.com/structure_detail/5511/</ref> | ||
== Blood Supply == | == Blood Supply == | ||
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*Teres Minor, along with [[Infraspinatus|Infraspinatus]], primarily produces external rotation of the shoulder joint.<ref name="aex" /> | *Teres Minor, along with [[Infraspinatus|Infraspinatus]], primarily produces external rotation of the shoulder joint.<ref name="aex" /> | ||
*It assists in adduction and extension of the shoulder.<ref name="wheeles">http://www.wheelessonline.com/ortho/teres_minor</ref> | *It assists in adduction and extension of the shoulder.<ref name="wheeles">http://www.wheelessonline.com/ortho/teres_minor</ref> | ||
*When the humerus is stabilized, abducts the inferior angle of the scapula.<ref name="wheeles" / | *When the humerus is stabilized, abducts the inferior angle of the scapula.<ref name="wheeles" /> | ||
== Function == | == Function == | ||
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In concert with the other rotator cuff muscles, Teres Minor is instrumental in providing stability to the shoulder joint, and helps to hold the humeral head in the glenoid cavity of the scapula.<ref name="aex" /> | In concert with the other rotator cuff muscles, Teres Minor is instrumental in providing stability to the shoulder joint, and helps to hold the humeral head in the glenoid cavity of the scapula.<ref name="aex" /> | ||
== Resources == | |||
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== References == | |||
== References | |||
<references /> | <references /> | ||
[[Category:Shoulder]] [[Category:Anatomy]] [[Category:Shoulder_Anatomy]] | [[Category:Shoulder]] [[Category:Anatomy]] [[Category:Shoulder_Anatomy]] | ||
Revision as of 20:54, 3 March 2018
Original Editor - Wendy Walker
Lead Editors - Kim Jackson, Wendy Walker, George Prudden, WikiSysop, 127.0.0.1, Oyemi Sillo, Naomi O'Reilly, Joao Costa and Aya Alhindi
Description[edit | edit source]
Teres Minor is a narrow muscle which lies below infraspinatus, above teres major and triceps brachii, and deep to deltoid. It is one of the four muscles which comprise the Rotator Cuff.
Origin[edit | edit source]
The upper two-thirds of the lateral border of the scapula.[1]
Insertion[edit | edit source]
The upper fibres end in a tendon which inserts into the inferior facet of the greater tubercle of the humerus. The lower fibres insert into the humerus directly below the inferior facet of the greater tubercle of the humerus.[1]
Nerve Supply[edit | edit source]
The axillary nerve (roots C5, C6) from the posterior cord of the brachial plexus.<refname="aex">http://www.anatomyexpert.com/structure_detail/5511/</ref>
Blood Supply[edit | edit source]
The circumflex scapular artery and the posterior circumflex humeral artery.[2]
Action[edit | edit source]
- Teres Minor, along with Infraspinatus, primarily produces external rotation of the shoulder joint.[2]
- It assists in adduction and extension of the shoulder.[3]
- When the humerus is stabilized, abducts the inferior angle of the scapula.[3]
Function[edit | edit source]
In concert with the other rotator cuff muscles, Teres Minor is instrumental in providing stability to the shoulder joint, and helps to hold the humeral head in the glenoid cavity of the scapula.[2]
Resources[edit | edit source]
References[edit | edit source]
- ↑ 1.0 1.1 Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. http://www.bartleby.com/107/123.html
- ↑ 2.0 2.1 2.2 Cite error: Invalid
<ref>tag; no text was provided for refs namedaex - ↑ 3.0 3.1 http://www.wheelessonline.com/ortho/teres_minor
