Anterior Axioappendicular Muscles – Origin, Function

Last updated: February 7, 2026Reviewed date: February 7, 2026Reading time: 3 min read

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Article Summary

Anterior Axioappendicular Muscles /The Axioappendicular muscles are the muscles that extend between the axial and (superior or inferior) appendicular skeletons. There are two groups, the anterior axioappendicular muscles, and the posterior axioappendicular muscles. Anterior Axioappendicular Muscles (Thoracoappendicular Muscles)[Rx] Pectoralis major Function: flexion, adduction, medial rotation of the humerus. Origin: clavicular head: medial clavicle anteriorly, sternocostal head: anterior sternum and costal cartilages of ribs 1 to 6 as well as external...

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Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.

Educational health guideWritten for patient understanding and clinical awareness.

Reviewed content workflowUse writer and reviewer profiles for stronger trust.

Emergency safety firstUrgent warning signs are highlighted below.

Definition

Anterior Axioappendicular Muscles /The Axioappendicular muscles are the muscles that extend between the axial and (superior or inferior) appendicular skeletons. There are two groups, the anterior axioappendicular muscles, and the posterior axioappendicular muscles.

Anterior Axioappendicular Muscles (Thoracoappendicular Muscles)[Rx]

Pectoralis major

Function: flexion, adduction, medial rotation of the humerus.
Origin: clavicular head: medial clavicle anteriorly, sternocostal head: anterior sternum and costal cartilages of ribs 1 to 6 as well as external oblique aponeurosis
Insertion: the lateral edge of an intertrabecular groove of the humerus
Innervation: medial pectoral nerve (C8, T1) lateral pectoral nerve (C5, C6, C7) of brachial plexus

Pectoralis minor

Function: Depression of the shoulder, protraction of the scapula
Origin: Third, fourth, fifth ribs close to their respective costal cartilages
Insertion: Coracoid process
Innervation: Medial pectoral nerve (C8, T1)

Subclavius

Function: Depression and stabilization of the clavicle
Origin: First rib medially
Insertion: Middle of the clavicle, inferiorly
Innervation: Nerve to subclavius (C5, C6)

Serratus anterior

Function: Protraction of scapula, rotation of the scapula
Origin: Lateral first to the eighth rib
Insertion: anterior scapula, medially
Innervation: long thoracic nerve (C5, C6, C7)

Posterior Axioappendicular Muscles

Superficial Layer

Latissimus dorsi

Function: Adduction, medial rotation, extension of humerus
Origin: Spinous processes of seventh to 12th thoracic vertebrae, iliac crest, thoracolumbar fascia, and inferior third and fourth rib
Insertion: Intertubercular groove of humerus
Innervation: Thoracodorsal nerve (C5,C6,C7)

Trapezius

Function: Elevation, depression, and retraction of the scapula, rotation of glenoid cavity
Origin: Superior nuchal line, nuchal ligament, occipital protuberance, spinous processes of C7- T12
Insertion: Spine of scapula, acromion, and lateral clavicle
Innervation: CN XI

Deep Layer

Levator scapulae

Function: Adduction, medial rotation, an extension of humerus
Origin: Transverse processes of C1 through C4 vertebrae
Insertion: Scapula at its medial border
Innervation: Thoracodorsal nerve (C5, C6, C7)

Rhomboid major

Function: Retraction of scapula and depression of glenoid cavity
Origin: Spinous processes of T2 through T5 vertebrae
Insertion: Inferior aspect of medial scapula
Innervation: Dorsal scapular nerve (C4, C5)

Rhomboid minor

Function: Retraction of scapula and depression of glenoid cavity
Origin: Nuchal ligament as well as spines of C7 and T1 vertebrae
Insertion: Superior aspect of medial scapula
Innervation: Dorsal scapular nerve (C4, C5)

References

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

Write when the problem started and how it changed.
Bring old prescriptions, investigation reports, and current medicines.
Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

What is the most likely cause of my symptoms?
Which danger signs mean I should go to hospital quickly?
Which tests are necessary now, and which can wait?
How should I take medicines safely and what side effects should I watch for?
When should I come for follow-up?

Tests to discuss

Vital signs: temperature, pulse, blood pressure, oxygen saturation
Basic physical examination by a clinician
CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

Avoid heavy lifting, sudden bending, and prolonged bed rest.
Use comfortable posture and gentle movement as tolerated.
Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

Do not start antibiotics without a proper medical decision.
Do not use steroid tablets or injections casually for quick relief.
Do not delay emergency care because of home remedies.

Get urgent help if

Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.

Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Orthopedic / spine specialist, physical medicine doctor, or qualified clinician

Tests to discuss with doctor

Neurological examination for leg power, sensation, reflexes, and straight leg raise
X-ray only if injury, deformity, long-lasting pain, or doctor suspects bone problem
MRI discussion if severe nerve symptoms, weakness, bladder/bowel problem, or persistent symptoms

Questions to ask

What is the most likely cause of my symptoms?
Which warning signs mean I should go to emergency care?
Which tests are really needed now?
Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
Is physiotherapy, posture correction, or activity modification needed?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Go to emergency care if you notice:

Severe or rapidly worsening symptoms
Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration

Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.

Step 1
Check danger signs first

If danger signs are present, seek emergency care and do not wait for online information.
Step 2
Record the symptom story

Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.
Step 3
Visit a qualified clinician

A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.
Step 4
Do only useful tests

Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.
Step 5
Follow up and return early if worse

If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips

Take a written symptom diary and all previous prescriptions/test reports.
Do not hide medicines already taken, even herbal or over-the-counter medicines.
Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

Internal learning pathway

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