Search results for “Accessory Muscles”
197 results found
Article
Accessory muscle
Accessory muscles are a form of anatomic variation that refers to supplementary discrete muscles that are found alongside the normal expected musculature. They have been described in the neck, thorax, pelvis, upper and lower limbs.
See also
accessory muscles of respiration
Article
Accessory muscles of the ankle
Accessory muscles of the ankle are muscular anatomical variants that are usually asymptomatic but rarely cause symptoms or might be encountered on imaging studies.
The following accessory muscles around the ankle have been described 1-4:
posteromedial/flexor compartment
accessory flexor digit...
Article
Accessory muscles of respiration
Accessory muscles of respiration refer to muscles that provide assistance to the main breathing muscles, mainly when additional power is needed, for example during exercise or those with airway pathologies (e.g. COPD) 1,2.
During normal quiet breathing, inspiration is an active process primaril...
Article
Accessory muscles of the forearm, wrist and hand
Accessory muscles of the forearm, wrist and hand are muscular, usually asymptomatic, anatomical variants that might be encountered on imaging studies and confused with pathologic conditions.
The following accessory muscles around the forearm, wrist and hand have been described 1-6:
elbow
acc...
Article
Accessory peroneal muscles
Accessory peroneal muscles are a group of accessory muscles that can occur in the foot region as a normal variant in some individuals. The peroneal compartment is known as the lateral compartment of the leg.
Peroneus quartus muscle
Originally, several accessory muscles were distinguished in th...
Article
Accessory brachialis muscle
An accessory brachialis muscle, also known as brachialis accessorius muscle, is a very rare accessory muscle of the elbow and an anatomical variant.
Summary
origin: anterior surface of the lower humeral diaphysis
course: variably medial or lateral to the brachialis muscle
insertion: variable...
Article
Accessory soleus muscle
The accessory soleus muscle is an anatomical variant characterized by an additional distinct muscle encountered along a normal soleus muscle. It is uncommon with a prevalence of ~3% (range 0.7-5.5%) 1.
Summary
origin: fibula, soleal line of the tibia, or the anterior surface of the soleus musc...
Article
Accessory semimembranosus muscle
The accessory semimembranosus muscle is a rare accessory muscle of the posterior compartment of the thigh. It arises from the distal aspect of the semimembranosus muscle belly and courses through the popliteal fossa between it and the semitendinosus muscle medially and the biceps femoris lateral...
Article
Accessory flexor carpi ulnaris muscle
The accessory flexor carpi ulnaris (AFCU) is a rare accessory muscle of the forearm and wrist and a normal anatomical variant that can be found in addition to a normal flexor carpi ulnaris muscle.
Epidemiology
The accessory flexor carpi ulnaris muscle is considered very rare 1,2.
Associations...
Article
Accessory flexor digitorum longus muscle
The accessory flexor digitorum longus muscle is an accessory muscle in the deep posterior compartment of the leg with a reported prevalence of 6-8%. Unilateral muscles are more common although bilateral cases have been reported.
Summary
origin: variable; either the medial margin of the tibia a...
Article
Accessory extensor digiti secundus muscle
The accessory extensor digiti secundus muscle is a rare accessory muscle or tendon of the ankle and an anatomical variant.
Summary
origin: extensor hallucis longus tendon or muscle
insertion: medial phalanx of the second toe adjacent to the second tendon of the extensor digitorum longus muscl...
Article
Accessory abductor digiti minimi muscle (hand)
An accessory abductor digiti minimi (ADM) muscle is the most common accessory muscle of the hand and wrist, found in 24% of individuals on the hypothenar eminence. When present it is one of the intrinsic muscles of the hand.
Summary
origin:
antebrachial fascia passing anteriorly to Guyon cana...
Case
Subclavius posticus muscle - an accessory muscle
Published
09 Sep 2014
84% complete
MRI
Annotated image
Article
Accessory flexor digitorum superficialis indicis muscle
An accessory flexor digitorum superficialis indicis muscle is an unusual accessory muscle of the hand and wrist and a normal anatomical variant.
Summary
origin: flexor digitorum superficialis tendon near the transverse carpal ligament
insertion: metacarpal head of the index finger near the A1...
Case
Digastric muscle - accessory belly
Published
03 Dec 2022
72% complete
Ultrasound
Annotated image
Case
Accessory piriformis muscle
Published
24 Jan 2022
95% complete
Annotated image
MRI
Case
Accessory soleus muscle
Published
04 May 2019
94% complete
Ultrasound
Case
Accessory soleus muscle
Published
31 Aug 2022
95% complete
MRI
Case
Accessory soleus muscle
Published
20 Oct 2022
92% complete
MRI
Case
Accessory soleus muscle
Published
15 Apr 2020
89% complete
MRI