Variable Anatomy of the Middle Cerebral Artery from Its Origin to the Edge of the Sylvian Fissure: A Direct Fresh Brain Study

Table 2

Length of the main trunk of the MCA and number of perforators and cortical branches.

Length of main trunk of the MCA (mm)
Mean ± SD	20.6 ± 6.2
Range	6.5–35.0
Number of perforators
Mean ± SD	9.0 ± 2.6
Range	4–15
Mode	9
Least frequent number	4
Number of cortical branches
Mean ± SD	9.3 ± 1.3
Range	6–13
Mode	9
Least frequent number	6 and 13

Abbreviations: MCA, middle cerebral artery; SD, standard deviation.