External intercostal muscles
External intercostal muscles are eleven in number on both sides.
origin:
Lower border of ribs.
Insertion :
Upper border of rib below.
Nerve:
intercostal nerves.
Actions:
Inhalation.
Similar Posts
Muscles of mastication
Introduction The muscles of mastication move your mandible during mastication and speech. The muscles of mastication are the Masseter, the Temporalis, The Lateral pterygoid, and the medial pterygoid. They develop from the mesoderm of the first branchial arch and are supplied by the mandibular nerve which is the nerve of the branchial arch. The muscles…
Muscle Tone Physiology and Abnormalities
What is a Muscle Tone? Due to reciprocal and hierarchical anatomical relationships, muscle tone is a dynamic and complicated condition. Its input and output systems control it and interact crucially with the demands of task performance and power. In simple terms, tone is a motor control concept that maintains power balance inherently. The brainstem reticular…
Extensor Digiti Minimi Muscle
Extensor digiti minimi Muscle Anatomy Extensor digiti minimi is a long, thin muscle found in the posterior forearm. It extends from the distal humerus to the fifth digit. Together with anconeus, brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, and extensor carpi ulnaris, it is a member of the superficial forearm extensor…
Flexor digitorum brevis muscle: Origin, Insertion, Action, Exercise
Flexor digitorum brevis (FDB) is a large muscle located deep in the sole of the foot, just above the central part of the plantar fascia, with which it is firmly united and inferior to the tendon of Flexor Digitorum Longus. It is the central muscle of the superficial layer of the plantar foot muscles. Origin:…
Masseter Muscle Anatomy
Introduction The masseter is a quadrilateral muscle that covers the lateral surface of the ramus of the mandible. The masseter muscle fibres are arranged in three layers. The masseter muscle is a paired, strong, thick, and rectangular muscle that originates from the zygomatic arch and extends down to the mandibular angle. It contains a superficial…
