Coracoid process

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Coracoid process_table_infobox_0

Coracoid processCoracoid process_header_cell_0_0_0
DetailsCoracoid process_header_cell_0_1_0
IdentifiersCoracoid process_header_cell_0_2_0
LatinCoracoid process_header_cell_0_3_0 Processus coracoideusCoracoid process_cell_0_3_1
MeSHCoracoid process_header_cell_0_4_0 Coracoid process_cell_0_4_1
TA98Coracoid process_header_cell_0_5_0 Coracoid process_cell_0_5_1
TA2Coracoid process_header_cell_0_6_0 Coracoid process_cell_0_6_1
FMACoracoid process_header_cell_0_7_0 Coracoid process_cell_0_7_1

The coracoid process (from Greek κόραξ, raven) is a small hook-like structure on the lateral edge of the superior anterior portion of the scapula (hence: coracoid, or "like a raven's beak"). Coracoid process_sentence_0

Pointing laterally forward, it, together with the acromion, serves to stabilize the shoulder joint. Coracoid process_sentence_1

It is palpable in the deltopectoral groove between the deltoid and pectoralis major muscles. Coracoid process_sentence_2

Structure Coracoid process_section_0

The coracoid process is a thick curved process attached by a broad base to the upper part of the neck of the scapula; it runs at first upward and medialward; then, becoming smaller, it changes its direction, and projects forward and lateralward. Coracoid process_sentence_3

The ascending portion, flattened from before backward, presents in front a smooth concave surface, across which the subscapularis passes. Coracoid process_sentence_4

The horizontal portion is flattened from above downward; its upper surface is convex and irregular, and gives attachment to the pectoralis minor; its under surface is smooth; its medial and lateral borders are rough; the former gives attachment to the pectoralis minor and the latter to the coracoacromial ligament; the apex is embraced by the Conjoint tendon of origin of the coracobrachialis and short head of the biceps brachii and gives attachment to the coracoclavicular fascia. Coracoid process_sentence_5

On the medial part of the root of the coracoid process is a rough impression for the attachment of the conoid ligament; and running from it obliquely forward and lateralward, on to the upper surface of the horizontal portion, is an elevated ridge for the attachment of the trapezoid ligament. Coracoid process_sentence_6

Function Coracoid process_section_1

It is the site of attachment for several structures: Coracoid process_sentence_7

Coracoid process_unordered_list_0

Clinical significance Coracoid process_section_2

The coracoid process is palpable just below the lateral end of the clavicle (collar bone). Coracoid process_sentence_8

It is otherwise known as the "Surgeon's Lighthouse" because it serves as a landmark to avoid neurovascular damage. Coracoid process_sentence_9

Major neurovascular structures enter the upper limb medial to the coracoid process, so that surgical approaches to the shoulder region should always take place laterally to the coracoid process. Coracoid process_sentence_10

Other animals Coracoid process_section_3

In monotremes, the coracoid is a separate bone. Coracoid process_sentence_11

Reptiles, birds, and frogs (but not salamanders) also possess a bone by this name, but is not homologous with the coracoid process of mammals. Coracoid process_sentence_12

Analyses of the size and shape of the coracoid process in Australopithecus africanus (STS 7) have shown that in this species it displayed a prominent dorsolateral tubercle placed more laterally than in modern humans. Coracoid process_sentence_13

This reflect, according to one interpretation, a scapula positioned high on a funnel-shaped thorax and a clavicle positioned obliquely as in extant great apes. Coracoid process_sentence_14

Additional images Coracoid process_section_4

Coracoid process_unordered_list_1

  • Coracoid process_item_1_7
  • Coracoid process_item_1_8
  • Coracoid process_item_1_9

Credits to the contents of this page go to the authors of the corresponding Wikipedia page: process.